CN102636040A - Self-study furnace temperature control method and control system - Google Patents
Self-study furnace temperature control method and control system Download PDFInfo
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- CN102636040A CN102636040A CN2011100393685A CN201110039368A CN102636040A CN 102636040 A CN102636040 A CN 102636040A CN 2011100393685 A CN2011100393685 A CN 2011100393685A CN 201110039368 A CN201110039368 A CN 201110039368A CN 102636040 A CN102636040 A CN 102636040A
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Abstract
The invention discloses a self-study furnace temperature control method comprising the following steps of: setting array power values at a self-study phase; calculating theoretical flows of coal gas and air in each group of power values; firstly adjusting opening degrees of a coal gas valve and an air valve by each group of the power values and measuring actual flows of the coal gas and the air; if difference values between the theoretical flows of the coal gas and the air and the actual flows of the coal gas and the air are less than pre-set values, keeping the opening degrees of the coal gas valve and the air valve; otherwise, adjusting a PID (Proportion Integration Differentiation) control parameters; after the pre-set time is up, measuring the actual flows of the existing coal gas and air; if the difference value between the theoretical flows of the existing coal gas and air and the actual flows of the existing coal gas and air is still less than the pre-set value, recording the opening degrees of the existing coal gas valve and air valve; otherwise, adjusting the PID control parameters; if all the power values are successfully studied, marking the self-study to be successful and switching to enter a normal control phase; and otherwise, marking the self-study to be failed, recording a failing position, and finishing the self-study phase and reporting errors.
Description
Technical field
The present invention relates to the smelting equipment field, relate in particular to a kind of self study method for controlling furnace temperature and control system.
Background technology
The accuracy of measurement of furnace temperature has a strong impact on the quality and the performance of product, and the furnace temperature precision is most important for properties of product, and the furnace temperature precise decreasing can directly cause properties of product defective.General temperature control system is because the power designs of burner is bigger, and thermo-lag and thermal inertia are bigger when causing adjustment, and the furnace temperature curve is self-sustained oscillation when making stable state, during unstable state transit time long, these have all had a strong impact on performance of products and lumber recovery.Common method for controlling furnace temperature is dual crossing PID (ratio, integration, differential) control, and this method reaches the purpose of controlling furnace temperature through the ratio of coal gas and air and the component bound that is provided with mutually of ratio.The setting value of coal gas and air is calculated the back through the dual crossing module and is set flow to coal gas control and air control PID module separately; The PID module outputs to the gas valve air door through calculating; The aperture of by-pass valve control is regulated aperture according to the feedback flow then gas flow, air mass flow actual value and setting value is matched.Can bring a problem like this: after set value of the power was sent to the dual crossing module, because the coal gas setting value will receive the restriction of air setting value bound, the air setting value received the restriction of coal gas setting value bound again; So the slope that coal gas setting value and air setting value rise can be too not fast, they alternately rise, and wait to rise to after the set value of the power; Some times have been experienced; To accurate Control for Kiln Temperature fast, there are some defectives in the hysteresis of life period.Valve specifies aperture to need the regular hour because PID calculates to arrive, and arrives this aperture because overshoot needs repeatedly to regulate just can reach balance.This processes waste furnace temperature regulate the time, this more serious Control for Kiln Temperature that lagged behind is made the matter worse.
Application number is 200410024768.9; A kind of method of controlling belt steel temperature has been explained in the patent application that is entitled as " a kind of method of controlling belt steel temperature "; It comprises the steps: that A. utilizes the generalized predictive control principle, according to the band temperature with the warm dynamic model prediction a certain moment in future; B. making the temperature of object tape steel is principle with predicting that the difference of being with temperature reaches minimum of a value, calculates the gas flow deviation that needs; C. combine the gas flow deviation calculation to go out the gas flow setting value according to actual gas flow again; D. the gas flow setting value is sent to the instrument control appliance; E. when warm attitude, carry out the self study of static models and dynamic model, and carry out the gas flow setting value once more and calculate according to actual band temperature.The present invention can fast, accurately control belt steel temperature, and they can be through parameter configuration applicable to different production lines.Said method is applicable to the temperature control of band steel, and is not suitable for the control of furnace temperature.So, need a kind of method and system that can effectively control in the art to furnace temperature.
Summary of the invention
The present invention is intended to propose a kind of self study method for controlling furnace temperature and control system.
According to an aspect of the present invention, propose a kind of self study method for controlling furnace temperature, comprise following step:
First step switches the entering self study stage;
Second step is set the array performance number, calculates total specified power and each according to burner power and calorific value of gas and organizes coal gas and the theoretical delivery of air under the performance number;
Third step is since first group of performance number study;
The 4th step; According to the coal gas under selected this group performance number and the theoretical delivery of air; Aperture based on PID control and regulation gas valve and air door; Measure the actual flow of coal gas and air, if the difference of the theoretical delivery of coal gas and air and actual flow, then keeps the aperture of current gas valve and air door less than setting value E and gets into next step; If the theoretical delivery of coal gas and air and the difference of actual flow are not less than setting value E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E, if can't make the difference of theoretical delivery and actual flow of coal gas and air, then get into the 8th step less than setting value E;
The 5th step; Through measuring the current coal gas and the actual flow of air again after the time T of setting; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door and get into next step; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E and repeat the 5th step, if make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, then get into the 8th step like method;
The 6th step is selected next group performance number, repeats third step to the five steps and all learns to finish until all performance numbers, gets into the 7th step;
The 7th step, mark self study success is also switched the normal control stage of entering;
The 8th step, mark self study failure and record failure position, the end self study stage also reports an error.
Wherein, total specified power is: the rated power * burner number of single burner; The theoretical delivery of the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number; The theoretical delivery of the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.
According to an embodiment, the array performance number comprises 10 groups of performance numbers, is respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.
According to an embodiment,, learn each group performance number successively according to order from low to high since the study of 10% performance number.
According to an embodiment, time T is 30 seconds, and setting value E is 10m
3/ h.
According to a further aspect in the invention; A kind of self study Control for Kiln Temperature system is proposed; Comprise: burner and thermocouple, gas flow control valve, measurement of gas flow device; Be used to measure current gas flow, air flow rate adjustment valve, air-flow measurement device, be used to measure current air mass flow, PID controller and Control for Kiln Temperature module.Wherein the PID controller is connected to gas flow control valve and air flow rate adjustment valve, regulates the aperture of gas flow control valve and air flow rate adjustment valve based on pid parameter.The Control for Kiln Temperature module is connected to PID controller, measurement of gas flow device and air-flow measurement device; The Control for Kiln Temperature module has self study pattern and normal two kinds of patterns of control model; The Control for Kiln Temperature module is switched regularly or according to instruction and is got into the self study pattern, in the self study pattern: set the array performance number and calculate total specified power and each according to burner power and calorific value of gas and organize coal gas and the theoretical delivery of air under the performance number; Since first group of performance number study; According to selected should the coal gas of group under performance number and the theoretical delivery of air by the aperture of PID controller adjusting gas valve and air door; Measure the actual flow of coal gas and air through the measurement of gas flow device; If the theoretical delivery of coal gas and air and the difference of actual flow are less than setting value E; The aperture that then keeps current gas valve and air door, if the difference of the theoretical delivery of coal gas and air and actual flow is not less than setting value E, the parameter of then adjusting the PID controller with the aperture of regulating gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E; Through measuring the current coal gas and the actual flow of air through the measurement of gas flow device again after the time T of setting; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E, the parameter of then adjusting the PID controller is with the aperture of regulating gas valve and air door measurement once more after the difference of the theoretical delivery of coal gas and air and actual flow is less than setting value E and stand-by period T; Select the process of next group performance number and repetitive learning all to learn to finish successively until all performance numbers; If all performance numbers are learning success all, Control for Kiln Temperature module marks self study success is also switched the normal control stage of entering; If can't make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, Control for Kiln Temperature module marks self study failure is record failure position also, finishes the self study stage also to report an error.
According to an embodiment, the Control for Kiln Temperature module comprises parameter calculation apparatus, and this parameter calculation apparatus calculates said total specified power and is: the rated power * burner number of single burner; The theoretical delivery that this parameter calculation apparatus calculates the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number; The theoretical delivery that this parameter calculation apparatus calculates the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.
According to an embodiment, the array performance number that the Control for Kiln Temperature module is set comprises 10 groups of performance numbers, is respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.
According to an embodiment, the Control for Kiln Temperature module is learnt since 10% performance number, learns each group performance number successively according to order from low to high.
According to an embodiment, said Control for Kiln Temperature module comprises parameter setting apparatus, and this parameter setting apparatus setting-up time T is 30 seconds; It is 10m3/h that this parameter setting apparatus is set setting value E.
Self study Control for Kiln Temperature system of the present invention and self study method for controlling furnace temperature obtain the aperture and the flow of various power lower valves through self study at ordinary times.When receiving setting power, can rapidly valve open be arrived roughly needed aperture according to self study at ordinary times; And then the deviation of using coal gas amount and air capacity is carried out the PID adjusting; Calculate and regulate and need not just carry out PID, thereby practiced thrift the adjusting time from beginning.
Description of drawings
Fig. 1 has disclosed the flow chart according to self study method for controlling furnace temperature of the present invention.
Fig. 2 has disclosed the structure chart according to self study Control for Kiln Temperature of the present invention system.
Fig. 3 has disclosed a concrete control principle figure who realizes according to self study method for controlling furnace temperature of the present invention.
Fig. 4 disclosed according in one of self study method for controlling furnace temperature of the present invention concrete the realization to the control procedure of one group of performance number.
The specific embodiment
Self study Control for Kiln Temperature process generally comprises: utilize thermocouple to carry out temperature survey; For measured value and setting value compare; Deviation through obtaining the percentage of power output behind the PID module arithmetic, calculates gas flow and air mass flow as the input of PID control then.Next search learning outcome through study before, obtain needed gas valve aperture of this power and air door aperture, directly valve is reached the calculating aperture, burn with coal gas that flows through valve this moment and air and control furnace temperature.
PID control is ratio, integration, differential control.Comprise ratio (P) control, integration (I) control and differential (D) control three's combination.Ratio (P) control is the simplest a kind of control mode.The output of its controller and the proportional relation of error originated from input signal.There is steady-state error (Steady-state error) in system's output when proportional control only.In integration (I) control, the output of controller and error originated from input signal be integrated into proportional relation.To an automatic control system, if after getting into stable state, have steady-state error, then claim this control system be steady-state error arranged or be called for short poor system (System with Steady-state Error) arranged.In order to eliminate steady-state error, in controller, must introduce " integral ".Integral depends on the integration of time to error, and along with the increase of time, integral can increase.Like this, even if error is very little, integral also can strengthen along with the increase of time, and the output increase that it promotes controller further reduces steady-state error, up to equalling zero.In differential (D) control, the differential of the output of controller and error originated from input signal (being the error change rate) is proportional.Vibration even unstability may appear in automatic control system in overcoming the adjustment process of error.Its reason is owing to have big inertia assembly (link) or hysteresis (delay) assembly is arranged, and has the effect that suppresses error, and its variation always lags behind error change.The way that solves is the variation " in advance " that makes the effect that suppresses error, promptly in error near zero the time, the effect that suppresses error just should be zero.In other words, it is not enough often in controller, only to introduce " ratio " item, and the effect of proportional only is the amplitude of fault in enlargement; And what need at present to increase is " differential term ", the trend that its can predicated error changes, like this; Controller with ratio+differential; The effect of inhibition error Control is equalled zero, even be negative value, thereby avoid the serious overshoot of controlled volume.
With reference to shown in Figure 1, the present invention proposes a kind of self study method for controlling furnace temperature, comprising:
First step S11 switches the entering self study stage.
The second step S12 sets the array performance number, calculates total specified power and each according to burner power and calorific value of gas and organizes coal gas and the theoretical delivery of air under the performance number.In one embodiment, total specified power calculation is following: the rated power * burner number of single burner.The theoretical delivery of the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number.The theoretical delivery of the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.Performance number can comprise 10 groups of performance numbers, is respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.
Third step S13 is since first group of performance number study.In one embodiment, be since the study of 10% performance number, learn each group performance number successively according to order from low to high.
The 4th step S14; According to the coal gas under selected this group performance number and the theoretical delivery of air; Aperture based on PID control and regulation gas valve and air door; Measure the actual flow of coal gas and air, if the difference of the theoretical delivery of coal gas and air and actual flow, then keeps the aperture of current gas valve and air door less than setting value E and gets into next step; If the theoretical delivery of coal gas and air and the difference of actual flow are not less than setting value E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E, if can't make the difference of theoretical delivery and actual flow of coal gas and air, then get into the 8th step less than setting value E.In one embodiment, the selected value of E is that E is 10m
3/ h.
The 5th step S15; Through measuring the current coal gas and the actual flow of air again after the time T of setting; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door and get into next step; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E and repeat the 5th step, if make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, then get into the 8th step like method.In one embodiment,
The 6th step S16 selects next group performance number, repeats third step to the five steps and all learns to finish until all performance numbers, gets into the 7th step.
The 7th step S17, mark self study success is also switched the normal control stage of entering.The selected value of time T is 30 seconds.
The 8th step S18, mark self study failure and record failure position, the end self study stage also reports an error.
With reference to shown in Figure 2, the invention allows for a kind of self study Control for Kiln Temperature system 20, comprising: burner 21 and thermocouple 22; Gas flow control valve 23; Be used to measure the measurement of gas flow device 24 of current gas flow; Air flow rate adjustment valve 25; Be used to measure the air-flow measurement device 26 of current air mass flow; PID controller 27, PID controller 27 are connected to gas flow control valve 23 and air flow rate adjustment valve 25, and PID controller 27 is regulated the aperture of gas flow control valve and air flow rate adjustment valve based on pid parameter; Control for Kiln Temperature module 28; Control for Kiln Temperature module 28 is connected to PID controller 27, measurement of gas flow device 24 and air-flow measurement device 26; Control for Kiln Temperature module 28 has self study pattern and normal two kinds of patterns of control model; Control for Kiln Temperature module 28 is switched regularly or according to instruction and is got into the self study pattern, and in the self study pattern: Control for Kiln Temperature module 28 is at first set the array performance number and calculated total specified power and each according to burner power and calorific value of gas and organize coal gas and the theoretical delivery of air under the performance number.In one embodiment; Control for Kiln Temperature module 28 comprises parameter calculation apparatus 29; Parameter calculation apparatus 29 calculates total specified power: the rated power * burner number of single burner, the theoretical delivery that calculates the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number.The theoretical delivery that calculates the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.In one embodiment, 10 groups of performance numbers are set altogether, are respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.Control for Kiln Temperature module 28 promptly since the study of 10% performance number, is learnt each group performance number according to order from low to high from first group of performance number afterwards successively.Performance number for 10%; Control for Kiln Temperature module 28 is regulated gas valve and air door according to the theoretical delivery of coal gas under selected this group performance number and air by the PID controller aperture; Measure the actual flow of coal gas and air through the measurement of gas flow device; If the theoretical delivery of coal gas and air and the difference of actual flow are less than setting value E; The aperture that then keeps current gas valve and air door; If the theoretical delivery of coal gas and air and the difference of actual flow are not less than setting value E, the parameter of then adjusting the PID controller with the aperture of regulating gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E.In one embodiment, Control for Kiln Temperature module 28 comprises parameter setting apparatus 30, and it is 10m that parameter setting apparatus 30 is set setting value E
3/ h.Parameter setting apparatus 30 is gone back setting-up time T; Measure the current coal gas and the actual flow of air through the measurement of gas flow device again behind the elapsed time T; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E, the parameter of then adjusting the PID controller is with the aperture of regulating gas valve and air door measurement once more after the difference of the theoretical delivery of coal gas and air and actual flow is less than setting value E and stand-by period T.In one embodiment, parameter setting apparatus setting-up time T is 30 seconds.Control for Kiln Temperature module 28 can select the process of next group performance number and repetitive learning all to learn to finish until all performance numbers successively.If all performance numbers are learning success all, Control for Kiln Temperature module marks self study success is also switched the normal control stage of entering; If can't make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, Control for Kiln Temperature module marks self study failure is record failure position also, finishes the self study stage also to report an error.
With shown in Figure 4, disclosed a concrete control principle figure and a control procedure that realizes with reference to figure 3 according to self study method for controlling furnace temperature of the present invention.The process that should specifically realize is following:
Setting current control model through software switch is the self study pattern.
10 groups of preset performance numbers: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, calculate the theoretical delivery of coal gas and air under every kind of power according to burner power and calorific value of gas.
At first begin study from power 10% according to default, coal gas and air PID adjuster are set comparatively mild, and gas valve and air door begin to open.When the difference of gas flow and air mass flow and calculated value during less than E, current valve opening remains unchanged.
Through detecting current gas flow and air mass flow again behind the T after a while, if the difference of present flow rate and calculated value, explains that changes in flow rate is little after valve opening is fixing still less than E, current state is a kind of stable state.Note the aperture of current gas valve and air door.
If the difference of gas flow and air mass flow and calculated value was greater than E after a last step finished back a period of time; Explain that the fixing back of valve opening changes in flow rate is bigger; Current state is a kind of non-steady state, and insincere corresponding to the valve opening of 10% power, system proceeds the PID control valve; Once more less than E, get into next step up to the difference of gas flow and air mass flow and calculated value then.
After the completion, system gets into the self study of next power 20%, and the rest may be inferred, accomplish 20%, 30% according to this ... the study of 100% power.
After accomplishing the study of whole power, trigger self study and accomplish and successful mark, self study finishes, and gets into normal control model.
If can't make the difference of gas flow and air mass flow and calculated value all the time less than E, system triggers study fail flag then, and set the study failed point, and need the pid parameter value of control valve this moment, or rationally adjust E and T value, learn again.
In Fig. 4, be example explanation processing procedure to a concrete performance number with 10% power.Calculate required gas flow calculating value through burner power * burner number/calorific value of gas * 10%; Obtain required air flow rate calculation value through gas flow calculating value * 4.2* coefficient of excess.Open gas valve and make flow begin increase with air door, when the difference of the actual value of gas flow and air mass flow and calculated value less than 10m
3During/h, valve stops action.Timer is started working, after 30 seconds when the difference of the actual value of gas flow and air mass flow and calculated value still less than 10m
3During/h, stability of flow this moment is described, is noted the aperture of current gas valve and air door, as the learning outcome of 10% power valve opening, the study of 10% power valve opening finishes.If the difference of the actual value of gas flow and air mass flow and calculated value is greater than 10m after 30 seconds
3/ h, the instability of flow before explaining, valve restart to regulate, and the difference of actual value and calculated value that makes gas flow and air mass flow is less than 10m
3/ h carries out 30 seconds time-delay comparison, again until stability of flow recording learning result.
Self study Control for Kiln Temperature system of the present invention and self study method for controlling furnace temperature obtain the aperture and the flow of various power lower valves through self study at ordinary times.When receiving setting power, can rapidly valve open be arrived roughly needed aperture according to self study at ordinary times; And then the deviation of using coal gas amount and air capacity is carried out the PID adjusting; Calculate and regulate and need not just carry out PID, thereby practiced thrift the adjusting time from beginning.
Claims (10)
1. a self study method for controlling furnace temperature is characterized in that, comprising:
First step switches the entering self study stage;
Second step is set the array performance number, calculates total specified power and each according to burner power and calorific value of gas and organizes coal gas and the theoretical delivery of air under the performance number;
Third step is since first group of performance number study;
The 4th step; According to the coal gas under selected this group performance number and the theoretical delivery of air; Aperture based on PID control and regulation gas valve and air door; Measure the actual flow of coal gas and air, if the difference of the theoretical delivery of coal gas and air and actual flow, then keeps the aperture of current gas valve and air door less than setting value E and gets into next step; If the theoretical delivery of coal gas and air and the difference of actual flow are not less than setting value E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E, if can't make the difference of theoretical delivery and actual flow of coal gas and air, then get into the 8th step less than setting value E;
The 5th step; Through measuring the current coal gas and the actual flow of air again after the time T of setting; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door and get into next step; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E; Then adjust aperture that pid control parameter regulates gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E and repeat the 5th step, if make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, then get into the 8th step like method;
The 6th step is selected next group performance number, repeats third step to the five steps and all learns to finish until all performance numbers, gets into the 7th step;
The 7th step, mark self study success is also switched the normal control stage of entering;
The 8th step, mark self study failure and record failure position, the end self study stage also reports an error.
2. self study method for controlling furnace temperature as claimed in claim 1 is characterized in that,
Said total specified power is: the rated power * burner number of single burner;
The theoretical delivery of the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number;
The theoretical delivery of the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.
3. self study method for controlling furnace temperature as claimed in claim 1 is characterized in that,
Said array performance number comprises 10 groups of performance numbers, is respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.
4. self study method for controlling furnace temperature as claimed in claim 3 is characterized in that,
Since the study of 10% performance number, learn each group performance number successively according to order from low to high.
5. self study method for controlling furnace temperature as claimed in claim 1 is characterized in that,
Said time T is 30 seconds, and said setting value E is 10m
3/ h.
6. a self study Control for Kiln Temperature system is characterized in that, comprising:
Burner and thermocouple;
The gas flow control valve;
The measurement of gas flow device is measured current gas flow;
Air flow rate adjustment valve;
The air-flow measurement device is measured current air mass flow;
The PID controller is connected to said gas flow control valve and air flow rate adjustment valve, regulates the aperture of gas flow control valve and air flow rate adjustment valve based on pid parameter;
The Control for Kiln Temperature module; Be connected to said PID controller, measurement of gas flow device and air-flow measurement device; Said Control for Kiln Temperature module has self study pattern and normal two kinds of patterns of control model; The Control for Kiln Temperature module regularly or according to instruction is switched entering self study pattern, in the self study pattern:
Set the array performance number and according to burner power and calorific value of gas calculate total specified power and
The coal gas under each group performance number and the theoretical delivery of air;
Since first group of performance number study; According to selected should the coal gas of group under performance number and the theoretical delivery of air by the aperture of PID controller adjusting gas valve and air door; Measure the actual flow of coal gas and air through the measurement of gas flow device; If the theoretical delivery of coal gas and air and the difference of actual flow are less than setting value E; The aperture that then keeps current gas valve and air door, if the difference of the theoretical delivery of coal gas and air and actual flow is not less than setting value E, the parameter of then adjusting the PID controller with the aperture of regulating gas valve and air door until the difference of the theoretical delivery of coal gas and air and actual flow less than setting value E;
Through measuring the current coal gas and the actual flow of air through the measurement of gas flow device again after the time T of setting; If the actual flow of current coal gas and air and the difference of theoretical delivery are still less than E; Note the aperture of current gas valve and air door; If the actual flow of current coal gas and air and the difference of theoretical delivery are not less than E, the parameter of then adjusting the PID controller is with the aperture of regulating gas valve and air door measurement once more after the difference of the theoretical delivery of coal gas and air and actual flow is less than setting value E and stand-by period T;
Select the process of next group performance number and repetitive learning all to learn to finish successively until all performance numbers;
If all performance numbers are learning success all, Control for Kiln Temperature module marks self study success is also switched the normal control stage of entering; If can't make the difference of theoretical delivery and actual flow of coal gas and air less than setting value E, Control for Kiln Temperature module marks self study failure is record failure position also, finishes the self study stage also to report an error.
7. self study Control for Kiln Temperature as claimed in claim 6 system is characterized in that said Control for Kiln Temperature module comprises parameter calculation apparatus,
This parameter calculation apparatus calculates said total specified power: the rated power * burner number of single burner;
The theoretical delivery that this parameter calculation apparatus calculates the coal gas under each group performance number is: total specified power/calorific value of gas * should organize the power percentage of performance number;
The theoretical delivery that this parameter calculation apparatus calculates the air under each group performance number is: the coal gas theoretical delivery * 4.2* coefficient of excess of this group performance number.
8. self study Control for Kiln Temperature as claimed in claim 6 system is characterized in that,
The array performance number that said Control for Kiln Temperature module is set comprises 10 groups of performance numbers, is respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of total specified power.
9. self study Control for Kiln Temperature as claimed in claim 8 system is characterized in that,
Said Control for Kiln Temperature module is learnt since 10% performance number, learns each group performance number successively according to order from low to high.
10. self study Control for Kiln Temperature as claimed in claim 6 system is characterized in that said Control for Kiln Temperature module comprises parameter setting apparatus,
This parameter setting apparatus setting-up time T is 30 seconds;
It is 10m that this parameter setting apparatus is set setting value E
3/ h.
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| CN103256425A (en) * | 2013-05-31 | 2013-08-21 | 中冶长天国际工程有限责任公司 | Method, device and system for sintering control |
| CN103454990A (en) * | 2013-05-22 | 2013-12-18 | 陈飞 | Equipment parameter adjusting method and device with learning capacity |
| CN104991589A (en) * | 2015-05-19 | 2015-10-21 | 云南电网有限责任公司昆明供电局 | Self-learning temperature precise control method |
| CN105527836A (en) * | 2015-12-23 | 2016-04-27 | 湘电风能有限公司 | PID (Proportion Integration Differentiation) control system and wind power plant group power control method |
| CN106801139A (en) * | 2017-01-19 | 2017-06-06 | 本钢板材股份有限公司 | Annealing furnace optimization of air-fuel ratio method |
| CN111142373A (en) * | 2019-12-31 | 2020-05-12 | 武汉天之渌科技有限公司 | Flow control method and device based on intelligent metering valve |
| CN111854459A (en) * | 2020-08-05 | 2020-10-30 | 广西柳州钢铁集团有限公司 | Accurate control method for furnace gas temperature of heating furnace |
| CN112180876A (en) * | 2020-10-19 | 2021-01-05 | 广东省特种设备检测研究院 | Big data based energy-saving control method for gas-fired boiler |
| CN114488774A (en) * | 2021-12-16 | 2022-05-13 | 上海中韩杜科泵业制造有限公司 | PID control parameter acquisition method, device, equipment and medium |
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| CN103454990A (en) * | 2013-05-22 | 2013-12-18 | 陈飞 | Equipment parameter adjusting method and device with learning capacity |
| CN103454990B (en) * | 2013-05-22 | 2016-02-17 | 陈飞 | A kind of device parameter control method and device with learning ability |
| CN103256425A (en) * | 2013-05-31 | 2013-08-21 | 中冶长天国际工程有限责任公司 | Method, device and system for sintering control |
| CN103256425B (en) * | 2013-05-31 | 2015-12-23 | 中冶长天国际工程有限责任公司 | A kind of sintering controlling method, device and system |
| CN104991589A (en) * | 2015-05-19 | 2015-10-21 | 云南电网有限责任公司昆明供电局 | Self-learning temperature precise control method |
| CN105527836A (en) * | 2015-12-23 | 2016-04-27 | 湘电风能有限公司 | PID (Proportion Integration Differentiation) control system and wind power plant group power control method |
| CN106801139A (en) * | 2017-01-19 | 2017-06-06 | 本钢板材股份有限公司 | Annealing furnace optimization of air-fuel ratio method |
| CN111142373A (en) * | 2019-12-31 | 2020-05-12 | 武汉天之渌科技有限公司 | Flow control method and device based on intelligent metering valve |
| CN111854459A (en) * | 2020-08-05 | 2020-10-30 | 广西柳州钢铁集团有限公司 | Accurate control method for furnace gas temperature of heating furnace |
| CN111854459B (en) * | 2020-08-05 | 2021-07-02 | 广西柳州钢铁集团有限公司 | Accurate control method for furnace gas temperature of heating furnace |
| CN112180876A (en) * | 2020-10-19 | 2021-01-05 | 广东省特种设备检测研究院 | Big data based energy-saving control method for gas-fired boiler |
| CN114488774A (en) * | 2021-12-16 | 2022-05-13 | 上海中韩杜科泵业制造有限公司 | PID control parameter acquisition method, device, equipment and medium |
| CN114488774B (en) * | 2021-12-16 | 2022-09-27 | 上海中韩杜科泵业制造有限公司 | PID control parameter acquisition method, device, equipment and medium |
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