CN103712235A - Primary air fan controlling method and device - Google Patents
Primary air fan controlling method and device Download PDFInfo
- Publication number
- CN103712235A CN103712235A CN201310739782.6A CN201310739782A CN103712235A CN 103712235 A CN103712235 A CN 103712235A CN 201310739782 A CN201310739782 A CN 201310739782A CN 103712235 A CN103712235 A CN 103712235A
- Authority
- CN
- China
- Prior art keywords
- coal pulverizer
- baffle opening
- value
- air quantity
- acquisition module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a primary air fan controlling method and belongs to the control technical field. The method comprises the steps of starting the current control period; acquiring set blast capacities and actual blast capacities; acquiring a first set value SP1, wherein SP1 is equal to the sum of the set blast capacities; acquiring a first measurement value PV1, wherein PV1 is equal to the sum of the actual blast capacities; acquiring a baffle opening degree adjustment value through primary proportional integral derivative (PID) operation on SP1 and PV1; acquiring a baffle opening degree current value; acquiring a baffle opening degree target value of a primary air fan corresponding to a coal mill; acquiring a baffle opening degree limiting value; judging whether the baffle opening degree target value is larger than the baffle opening degree limiting value, if yes, the baffle opening degree of the primary air fan is updated to be the baffle opening degree limiting value, and if not, the baffle opening degree of the primary air fan is updated to be the baffle opening degree target value; ending the current control period and starting the next control period. According to the primary air fan controlling method, throttling loss of a ventilation door is reduced to the minimum on the premise that the blast capacity of the coal mill is guaranteed, and therefore electric energy is saved.
Description
Technical field
The present invention relates to air-blower control technical field, particularly a kind of control method of primary air fan and device.
Background technology
Primary air fan is the visual plant of heat power station, for a wind of certain flow is provided to coal pulverizer, makes coal pulverizer by this wind, bring coal dust into boiler furnace.
Under automatic switching arc manipulation part, the primary air fan autocontrol method of existing boiler of power plant, using the blast of primary air fan output as control variables, is realized control discharge pressure of fan by adjusting the baffle opening of primary air fan, and then realizes and control coal pulverizer input air quantity.
In realizing process of the present invention, inventor finds that prior art at least exists following problem:
Easily the coal of mill is because coal pulverizer resistance is little, it is indoor that coal pulverizer only needs less blast just coal dust can be brought into boiler combustion, therefore need to turn down the entrance blast that coal pulverizer air door reduces coal pulverizer, air door turns down the restriction loss that causes primary air fan discharge quantity of fan unnecessary, causes waste of energy; The coal of difficult mill may also not reach the air quantity that coal pulverizer requires by coal pulverizer full trrottle, not only affects mill coal pulverizer system and normally moves, and the pulverizer capacity of sometimes also having to reduce, affects the normal operation of generating set.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides a kind of control method and control device of primary air fan.Described technical scheme is as follows:
On the one hand, provide a kind of control method of primary air fan, described method comprises:
Start current control cycle;
Obtaining air quantity state of a control is setting air quantity and the actual air volume of the coal pulverizer of auto state;
Obtain the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state;
Obtain the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state;
By described SP1 and described PV1 being carried out to the baffle opening adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing;
Obtain the baffle opening currency of the primary air fan that described coal pulverizer is corresponding;
By described baffle opening currency and described baffle opening adjusted value are carried out to the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing;
Obtain the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding;
Judge whether described baffle opening desired value is greater than described baffle opening limiting value, if so, the baffle opening of primary air fan corresponding to described coal pulverizer be updated to described baffle opening limiting value,
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening desired value;
Finish current control cycle, start next control cycle.
On the other hand, provide a kind of control device of primary air fan, described device comprises:
Start module, for starting current control cycle;
The first acquisition module, for obtaining setting air quantity and the actual air volume that air quantity state of a control is the coal pulverizer of auto state;
The second acquisition module, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 3rd acquisition module, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 4th acquisition module, the PV1 obtaining with described the 3rd acquisition module for the SP1 by described the second acquisition module is obtained carries out the baffle opening adjustment aperture adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing;
The 5th acquisition module, for obtaining the baffle opening currency of the primary air fan that described coal pulverizer is corresponding;
The 6th acquisition module, the baffle opening adjusted value obtaining for the baffle opening currency by described the 5th module is obtained and described four module carries out the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing;
The 7th acquisition module, for obtaining the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding;
Judge module, for judging whether the baffle opening desired value that described the 6th acquisition module obtains is greater than the baffle opening limiting value that described the 7th acquisition module obtains, if, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening limiting value that described the 7th acquisition module obtains
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening desired value that described the 6th acquisition module obtains;
Described startup module also, for finishing current control cycle, starts next control cycle.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The primary air fan control method that the embodiment of the present invention proposes, avoided and in prior art, usingd discharge pressure of fan and as control variables, control the way of primary air fan discharge quantity of fan, replace and directly using air quantity as control variables, the summation that coal pulverizer is set to air quantity is as control criterion (setting value), using coal pulverizer actual air volume comprehensively as feedback variable (measured value), by contrast, set the discharge quantity of fan that air quantity summation and actual air volume summation are adjusted primary air fan.By above measure, can avoid in prior art must reducing by turning down coal pulverizer air door when coal pulverizer resistance hour the waste of energy that the entrance blast of coal pulverizer causes, although also can avoid coal pulverizer air door standard-sized sheet when coal pulverizer resistance is large but still not reach requiring air quantity.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the control method flow chart of a kind of blower fan of providing of the embodiment of the present invention one;
Fig. 2 a is the control method flow chart of a kind of blower fan of providing of the embodiment of the present invention two;
Fig. 2 b is the control logic design drawing of a kind of blower fan of providing of the embodiment of the present invention two;
Fig. 3 is the control device structural representation of a kind of blower fan of providing of the embodiment of the present invention three;
Fig. 4 is the control device structural representation of a kind of blower fan of providing of the embodiment of the present invention four.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment mono-
The present embodiment provides a kind of control method of primary air fan, and referring to Fig. 1, the method flow that the present embodiment provides is specific as follows:
S101, starts current control cycle.
S102, obtaining air quantity state of a control is setting air quantity and the actual air volume of the coal pulverizer of auto state.
During the boiler operatiopn in thermal power plant, coal pulverizer is to the indoor pulverized coal conveying of boiler combustion.Described coal pulverizer grinds to form coal dust by raw coal, and the most of hot blast being then blown into by primary air fan and small part cold wind are dried coal dust bring into described boiler furnace.Conventionally, a 300MW and above firepower unit comprise 6 coal pulverizers and 2 primary air fans, 5 coal pulverizer operations in the time of at full capacity, and 2 primary air fans are jointly to the coal pulverizer heat air delivery and the small part cold wind that move.
The air quantity state of a control of described coal pulverizer comprises: manual mode and auto state.Manual mode refers to by operating personnel manually controls primary air fan to a wind of described coal pulverizer input, and auto state refers to by computer control primary air fan to a wind of described coal pulverizer input.
In order to guarantee the normal operation of thermal power generation unit, described coal pulverizer need to be carried the coal dust of specified quantitative within the unit interval to boiler furnace.Described setting air quantity is described coal pulverizer while carrying specified quantitative coal dust to boiler furnace within the unit interval corresponding air quantity.
The setting air quantity of coal pulverizer is set according to the coal-supplying amount of coal pulverizer by control system, and for example coal-supplying amount is larger, sets air quantity also larger; Under same load, operation coal pulverizer number of units is more, and the total setting air quantity of coal pulverizer is also relatively large.
Due to the fluctuation of coal-supplying amount and the impact of raw coal nonhomogeneous hardness, the actual air volume of coal pulverizer can not remain setting air quantity conventionally, for example: if raw coal hardness is compared with little and easy grinds, the resistance of coal pulverizer is less, the lower coal pulverizer actual air volume that can make of coal pulverizer inlet primary air pressure reaches setting air quantity, and now cold-hot air door will close smallerly; If raw coal hardness is compared with being difficult for grinds greatly, the resistance of coal pulverizer is larger, and cold-hot air door standard-sized sheet also not necessarily can make coal pulverizer actual air volume reach setting air quantity.。
S103, obtains the first setting value SP1, and described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state.
S104, obtains the first measured value PV1, and described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state.
S105, by carrying out the baffle opening adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing to described SP1 and described PV1.
Conventionally, by described SP1 and described PV1 are carried out to the first primary air fan movable vane of PID PID computing meeting generation or baffle opening instruction, in this instruction, carry baffle opening adjusted value.
PID(Proportion Integration Differentiation) basic principle of controlling is by measured value PV(Process Value) and setting value SP(set Point) contrast, then export corresponding output valve OP(Output Value).
The effect of baffle plate is to adjust primary air fan to the air quantity of a wind of coal pulverizer input, and baffle opening is larger, and primary air fan is larger to the air quantity of coal pulverizer input, and baffle opening is less, and primary air fan is less to the air quantity of coal pulverizer input.
By described SP1 and described PV1 are carried out to the baffle opening adjusted value that corresponding primary air fan is obtained in a PID computing.Particularly, if described PV1 is greater than described SP1, need to reduce the baffle opening of described primary air fan, described baffle opening adjusted value will reduce; If described PV1 is less than described SP1, need to increase the baffle opening of described primary air fan, described baffle opening adjusted value will increase.
S106, obtains the baffle opening currency of the primary air fan that described coal pulverizer is corresponding.
S107, by carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing.
S108, obtains the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding.
The baffle opening of primary air fan is larger, and the air quantity of primary air fan output is larger, and the blast of output is also higher.If the discharge pressure of fan of primary air fan is excessive, concerning axial fan, primary air pressure is too high likely causes described primary air fan generation surge.Therefore baffle opening limiting value need to be set guarantees that described primary air fan can normally move.
S109, judges whether described baffle opening desired value is greater than described baffle opening limiting value, if so, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening limiting value,
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening desired value.
When described baffle opening desired value is greater than described baffle opening limiting value, for described primary air fan, be axial fan, primary air pressure is too high likely there is surge.Surge is a kind of abnormal running state of blower fan, very harmful to blower fan.Therefore for guaranteeing the safe operation of described primary air fan, baffle opening that should described primary air fan is set to described baffle opening limiting value.
S110, finishes current control cycle, starts next control cycle.
In fired power generating unit, maintain the main purpose that certain discharge pressure of fan is not primary air fan, the Main Function of primary air fan is to provide coal pulverizer and grinds the required air quantity of coal dust, and only this need to have certain primary air pressure to guarantee.The primary air fan control method that the embodiment of the present invention proposes, avoided and in prior art, usingd discharge pressure of fan and as control variables, control the way of primary air fan discharge quantity of fan, replace and directly using air quantity as control variables, the summation that coal pulverizer is set to air quantity is as control criterion (setting value), using coal pulverizer actual air volume comprehensively as feedback variable (measured value), by contrast, set the discharge quantity of fan that air quantity summation and actual air volume summation are adjusted primary air fan.By above measure, can avoid in prior art must reducing by turning down coal pulverizer air door when coal pulverizer resistance hour the waste of energy that the entrance blast of coal pulverizer causes, although also can avoid coal pulverizer air door standard-sized sheet when coal pulverizer resistance is large but still not reach requiring air quantity.
Embodiment bis-
The present embodiment provides a kind of control method of primary air fan, and referring to Fig. 2 a, the method flow that the present embodiment provides is specific as follows:
S201, starts current control cycle.
S202, obtaining air quantity state of a control is setting air quantity and the actual air volume of the coal pulverizer of auto state.
S203, obtains the first setting value SP1, and described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state.
S204, obtains the first measured value PV1, and described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state.
S205, obtains air quantity correction factor.
Described air quantity correction factor is for revising described PV1.Described air quantity correction factor can rule of thumb be preset by operating personnel.
The present embodiment preferably, described in obtain air quantity correction factor and specifically comprise:
S2051, obtains hot air disperser instruction or the hot air disperser open degree feedback of the coal pulverizer in running status, and described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer.
Hot air disperser is for controlling coal pulverizer from the air quantity of a wind of primary air fan reception, if described hot air disperser aperture is larger, the air quantity of the wind that coal pulverizer receives from primary air fan is larger, if described hot air disperser aperture is less, the air quantity of the wind that coal pulverizer receives from primary air fan is less.
S2052, obtains the second measured value PV2, and described PV2 equals the hot air disperser aperture maximum in hot air disperser aperture that the described coal pulverizer in running status is corresponding.
From all hot air disperser instructions or hot air disperser feedback, select hot air disperser aperture maximum.
S2053, obtains the second setting value SP2.
Described the second setting value SP2 can rule of thumb be preset by operating personnel.
S2054, obtains air quantity correction initial coefficients by described SP2 and described PV2 are carried out to the 3rd PID PID computing.
S2055, is converted into described air quantity correction factor according to default transfer function by described air quantity correction initial coefficients.
Conventionally, the air quantity correction initial coefficients P exporting through PID computing is standard signal 0～100, and described transfer function fx1 is for being converted to 0.90～1.10 air quantity correction factor Q by the standard signal of PID computing output.Particularly, transfer function fx1 is: Q=0.002P+0.9.
S206, calculates the product of described PV1 and described air quantity correction factor, and the value of described PV1 is updated to this product.
The object of this step is the actual air volume summation (being described PV1) of the coal pulverizer that is auto state of all air quantity state of a controls of hot air disperser aperture maximum correction with all coal pulverizers in running status.Set under the prerequisite that air quantity requires guaranteeing that each coal pulverizer air quantity meets, the SR in the time of can reducing to greatest extent by a wind and enter coal pulverizer by revising, thus reduce the power consumption of primary air fan.
S207, by carrying out the baffle opening adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing to described SP1 and described PV1.
S208, obtains the baffle opening currency of the primary air fan that described coal pulverizer is corresponding.
S209, by carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing.
Due to pressure of primary air fan outlet, cross conference and cause surge to occur, the outlet primary air pressure in the time of therefore described primary air fan can being about to surge occurs is as limiting value.
Primary air pressure when correspondingly, obtaining described primary air fan and be about to surge occurs is as output primary air pressure limiting value.
S210, obtains the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding.
The effect of described baffle plate is to adjust primary air fan to the air quantity of coal pulverizer input, and described baffle opening is larger, and the discharge quantity of fan of corresponding primary air fan is larger, and described baffle opening is less, and the discharge quantity of fan of corresponding primary air fan is less.
The present embodiment preferably, can method by experiment obtain the correlation function fx2 between described primary air fan outlet pressure and baffle opening.By the known primary air pressure in the situation that, can obtain the baffle opening that described primary air fan is corresponding by described correlation function fx2.
S211, judges whether described baffle opening desired value is greater than described baffle opening limiting value, if so, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening limiting value,
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening desired value.
S212, finishes current control cycle, starts next control cycle.
S213, whether the coal pulverizer of monitoring in auto state there is tripping operation or state of a control conversion, if so:
First of coal pulverizer in auto state sets that air quantity is newly worth NSP1 and the first actual air volume is newly worth NPV1 after obtaining tripping operation or after state of a control conversion;
Obtain setting air quantity between described SP1 and the described NSP1 array { SP1 that successively decreases
i, obtain actual air volume between described PV1 and the described NPV1 array { PV1 that successively decreases
i; Described { SP1
iin element S P1
ifor the numerical value of take in the descending series that described NSP1 is tail headed by described SP1, described { PV1
iin element PV1
ifor the numerical value of take in the descending series that described NPV1 is tail headed by described PV1; Wherein, i=1,2,3 ..., n, n is described { SP1
iand described { PV1
iin the number of element;
In n-1 wheel control cycle after current control cycle, described SP1 equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Described PV1 equals PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From the n wheel control cycle after current control cycle, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state; Described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state.
The air quantity state of a control of the coal pulverizer relating in the embodiment of the present invention especially, can be controlled by manual automatic switchover M/A device.
Fig. 2 b shows take the logical design figure that control method that the embodiment of the present invention provides is basic engineering.
The method that the embodiment of the present invention provides is being usingd on the basis of air quantity as control variables, by hot air disperser aperture maximum correction actual air volume summation (being described PV), can realize and guarantee that each coal pulverizer air quantity meets under the prerequisite of setting air quantity requirement, make air door restriction loss be down to minimum, thereby saved electric energy.
Embodiment tri-
The present embodiment provides a kind of control device of primary air fan, and referring to Fig. 3, this device comprises:
The first acquisition module 302, for obtaining setting air quantity and the actual air volume that air quantity state of a control is the coal pulverizer of auto state;
The second acquisition module 303, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 3rd acquisition module 304, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 4th acquisition module 305, the PV1 obtaining with described the 3rd acquisition module 304 for the SP1 by described the second acquisition module 303 is obtained carries out the baffle opening adjustment aperture adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing;
The 5th acquisition module 306, for obtaining the baffle opening currency of the primary air fan that described coal pulverizer is corresponding;
The 6th acquisition module 307, the baffle opening adjusted value obtaining for the baffle opening currency by described the 5th module 306 is obtained and described four module 304 carries out the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing;
The 7th acquisition module 308, for obtaining the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding;
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening desired value that described the 6th acquisition module 307 obtains;
Described startup module 301 also, for finishing current control cycle, starts next control cycle.
Embodiment tetra-
The present embodiment provides a kind of control device of primary air fan, and referring to Fig. 4, this device comprises:
The first acquisition module 402, for obtaining setting air quantity and the actual air volume that air quantity state of a control is the coal pulverizer of auto state.
The second acquisition module 403, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state.
The 3rd acquisition module 404, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state.
The 8th acquisition module 405, for obtaining air quantity correction factor.
Particularly, described the 8th acquisition module 405 specifically comprises:
First obtains submodule 4051, and for obtaining hot air disperser instruction or the hot air disperser open degree feedback of the coal pulverizer in running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Second obtains submodule 4052, and for obtaining the second measured value PV2, described PV2 equals the hot air disperser aperture maximum in hot air disperser aperture that the described coal pulverizer in running status is corresponding;
The 3rd obtains submodule 4053, for obtaining the second setting value SP2;
The 4th obtains submodule 4054, for obtaining PV2 that submodule 4052 obtains and carry out the 3rd PID PID computing and obtain air quantity correction initial coefficients by obtaining to the described the 3rd SP2 and described second that submodule 4053 obtains;
The 5th conversion submodule, is converted into described air quantity correction factor for obtaining by the described the 4th the air quantity correction initial coefficients that submodule 4054 obtains according to default transfer function;
More new module 406, for calculating the product of the air quantity correction factor that PV1 that described the 3rd acquisition module 404 obtains and described the 8th acquisition module 405 obtain, and the value of described PV1 are updated to this product.
The 4th acquisition module 407, the PV1 obtaining with described more new module 406 for the SP1 by described the second acquisition module 403 is obtained carries out the baffle opening adjustment aperture adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing.
The 5th acquisition module 408, for obtaining the baffle opening currency of the primary air fan that described coal pulverizer is corresponding.
The 6th acquisition module 409, the baffle opening adjusted value obtaining for the baffle opening currency by described the 5th module 408 is obtained and described four module 407 carries out the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing.
The 7th acquisition module 410 is specifically for obtaining the discharge pressure of fan limiting value of the primary air fan that described coal pulverizer is corresponding;
According to default correlation function, obtain baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening desired value that described the 6th acquisition module 409 obtains;
Described startup module 401 also, for finishing current control cycle, starts next control cycle.
Whether monitoring module 412, there is tripping operation or state of a control conversion for the coal pulverizer of monitoring in auto state, if so:
First of coal pulverizer in auto state sets that air quantity is newly worth NSP1 and the first actual air volume is newly worth NPV1 after obtaining tripping operation or after state of a control conversion;
Obtain setting air quantity between described SP1 and the described NSP1 array { SP1 that successively decreases
i, obtain actual air volume between described PV1 and the described NPV1 array { PV1 that successively decreases
i; Described { SP1
iin element S P1
ifor the numerical value of take in the descending series that described NSP1 is tail headed by described SP1, described { PV1
iin element VP
ifor the numerical value of take in the descending series that described NPV1 is tail headed by described PV1; Wherein, i=1,2,3 ..., n, n is described { SP1
iand described { PV1
iin the number of element;
In n-1 wheel control cycle after current control cycle, order described the second acquisition module to obtain described SP1 and equal successively SP1
2, SP1
3, SP1
4..., SP1
n; Order described the 3rd acquisition module to obtain described PV1 and equal successively PV1
2, PV1
3, PV1
4..., PV1
n;
From the n wheel control cycle after current control cycle, order described the second acquisition module to obtain the setting air quantity sum that described SP1 equals the coal pulverizer that all air quantity state of a controls are auto state; Order described the 3rd acquisition module to obtain the actual air volume sum that described PV1 equals the coal pulverizer that all air quantity state of a controls are auto state.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a control method for primary air fan, is characterized in that, described method comprises:
Start current control cycle;
Obtaining air quantity state of a control is setting air quantity and the actual air volume of the coal pulverizer of auto state;
Obtain the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state;
Obtain the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state;
By described SP1 and described PV1 being carried out to the baffle opening adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing;
Obtain the baffle opening currency of the primary air fan that described coal pulverizer is corresponding;
By described baffle opening currency and described baffle opening adjusted value are carried out to the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing;
Obtain the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding;
Judge whether described baffle opening desired value is greater than described baffle opening limiting value, if so, the baffle opening of primary air fan corresponding to described coal pulverizer be updated to described baffle opening limiting value,
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to described baffle opening desired value;
Finish current control cycle, start next control cycle.
2. method as claimed in claim 1, is characterized in that, described method also comprises:
Whether the coal pulverizer of monitoring in auto state there is tripping operation or state of a control conversion, if so:
First of coal pulverizer in auto state sets that air quantity is newly worth NSP1 and the first actual air volume is newly worth NPV1 after obtaining tripping operation or after state of a control conversion;
Obtain setting air quantity between described SP1 and the described NSP1 array { SP1 that successively decreases
i, obtain actual air volume between described PV1 and the described NPV1 array { PV1 that successively decreases
i; Described { SP1
iin element S P1
ifor the numerical value of take in the descending series that described NSP1 is tail headed by described SP1, described { PV1
iin element PV1
ifor the numerical value of take in the descending series that described NPV1 is tail headed by described PV1; Wherein, i=1,2,3 ..., n, n is described { SP1
iand described { PV1
iin the number of element;
In n-1 wheel control cycle after current control cycle, described SP1 equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Described PV1 equals PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From the n wheel control cycle after current control cycle, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state; Described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state.
3. the method for claim 1, is characterized in that, described in obtain the primary air fan that described coal pulverizer is corresponding baffle opening limiting value specifically comprise:
Obtain the discharge pressure of fan limiting value of the primary air fan that described coal pulverizer is corresponding;
According to default correlation function, obtain baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
4. the method for claim 1, is characterized in that, described in obtain measured value PV1 after, before the described baffle opening adjusted value that obtains the primary air fan that described coal pulverizer is corresponding according to described SP1 and described PV1, also comprise:
Obtain air quantity correction factor;
Calculate the product of described PV1 and described air quantity correction factor, and the value of described PV1 is updated to this product.
5. method as claimed in claim 4, is characterized in that, described in obtain air quantity correction factor and specifically comprise:
The hot air disperser instruction or the hot air disperser open degree feedback that obtain the coal pulverizer in running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Obtain the second measured value PV2, described PV2 equals the hot air disperser aperture maximum in hot air disperser aperture that the described coal pulverizer in running status is corresponding;
Obtain the second setting value SP2;
By being carried out to the 3rd PID PID computing, described SP2 and described PV2 obtain air quantity correction initial coefficients;
According to default transfer function, described air quantity correction initial coefficients is converted into described air quantity correction factor.
6. a control device for primary air fan, is characterized in that, described device comprises:
Start module, for starting current control cycle;
The first acquisition module, for obtaining setting air quantity and the actual air volume that air quantity state of a control is the coal pulverizer of auto state;
The second acquisition module, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 3rd acquisition module, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum of the coal pulverizer that all air quantity state of a controls are auto state;
The 4th acquisition module, the PV1 obtaining with described the 3rd acquisition module for the SP1 by described the second acquisition module is obtained carries out the baffle opening adjustment aperture adjusted value that the primary air fan that described coal pulverizer is corresponding is obtained in the first PID PID computing;
The 5th acquisition module, for obtaining the baffle opening currency of the primary air fan that described coal pulverizer is corresponding;
The 6th acquisition module, the baffle opening adjusted value obtaining for the baffle opening currency by described the 5th module is obtained and described four module carries out the baffle opening desired value that the primary air fan that described coal pulverizer is corresponding is obtained in the 2nd PID computing;
The 7th acquisition module, for obtaining the baffle opening limiting value of the primary air fan that described coal pulverizer is corresponding;
Judge module, for judging whether the baffle opening desired value that described the 6th acquisition module obtains is greater than the baffle opening limiting value that described the 7th acquisition module obtains, if, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening limiting value that described the 7th acquisition module obtains
If not, the baffle opening of primary air fan corresponding to described coal pulverizer is updated to the baffle opening desired value that described the 6th acquisition module obtains;
Described startup module also, for finishing current control cycle, starts next control cycle.
7. install as claimed in claim 6, it is characterized in that, described device also comprises:
Whether monitoring module, there is tripping operation or state of a control conversion for the coal pulverizer of monitoring in auto state, if so:
First of coal pulverizer in auto state sets that air quantity is newly worth NSP1 and the first actual air volume is newly worth NPV1 after obtaining tripping operation or after state of a control conversion;
Obtain setting air quantity between described SP1 and the described NSP1 array { SP1 that successively decreases
i, obtain actual air volume between described PV1 and the described NPV1 array { PV1 that successively decreases
i; Described { SP1
iin element S P1
ifor the numerical value of take in the descending series that described NSP1 is tail headed by described SP1, described { PV1
iin element VP
ifor the numerical value of take in the descending series that described NPV1 is tail headed by described PV1; Wherein, i=1,2,3 ..., n, n is described { SP1
iand described { PV1
iin the number of element;
In n-1 wheel control cycle after current control cycle, order described the second acquisition module to obtain described SP1 and equal successively SP1
2, SP1
3, SP1
4..., SP1
n; Order described the 3rd acquisition module to obtain described PV1 and equal successively PV1
2, PV1
3, PV1
4..., PV1
n;
From the n wheel control cycle after current control cycle, order described the second acquisition module to obtain the setting air quantity sum that described SP1 equals the coal pulverizer that all air quantity state of a controls are auto state; Order described the 3rd acquisition module to obtain the actual air volume sum that described PV1 equals the coal pulverizer that all air quantity state of a controls are auto state.
8. device as claimed in claim 6, is characterized in that, described the 7th acquisition module specifically for:
Obtain the discharge pressure of fan limiting value of the primary air fan that described coal pulverizer is corresponding;
According to default correlation function, obtain baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
9. device as claimed in claim 6, is characterized in that, described device also comprises:
The 8th acquisition module, for obtaining air quantity correction factor;
New module more, for calculating the product of the air quantity correction factor that PV1 that described the 3rd acquisition module obtains and described the 8th acquisition module obtain, and is updated to this product by the value of described PV1.
10. device as claimed in claim 9, is characterized in that, described the 8th acquisition module specifically comprises:
First obtains submodule, and for obtaining hot air disperser instruction or the hot air disperser open degree feedback of the coal pulverizer in running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Second obtains submodule, and for obtaining the second measured value PV2, described PV2 equals the hot air disperser aperture maximum in hot air disperser aperture that the described coal pulverizer in running status is corresponding;
The 3rd obtains submodule, for obtaining the second setting value SP2;
The 4th obtains submodule, for obtaining PV2 that submodule obtains and carry out the 3rd PID PID computing and obtain air quantity correction initial coefficients by obtaining to the described the 3rd SP2 and described second that submodule obtains;
The 5th conversion submodule, is converted into described air quantity correction factor for obtaining by the described the 4th the air quantity correction initial coefficients that submodule obtains according to default transfer function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739782.6A CN103712235B (en) | 2013-12-26 | 2013-12-26 | A kind of control method of primary air fan and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739782.6A CN103712235B (en) | 2013-12-26 | 2013-12-26 | A kind of control method of primary air fan and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103712235A true CN103712235A (en) | 2014-04-09 |
| CN103712235B CN103712235B (en) | 2016-02-24 |
Family
ID=50405423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310739782.6A Active CN103712235B (en) | 2013-12-26 | 2013-12-26 | A kind of control method of primary air fan and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103712235B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238102A (en) * | 2017-05-31 | 2017-10-10 | 上海明华电力技术工程有限公司 | A kind of primary air fan RB control methods under full load mode |
| CN110701634A (en) * | 2019-09-18 | 2020-01-17 | 上海发电设备成套设计研究院有限责任公司 | Primary air pressure control system and control method thereof |
| WO2020191873A1 (en) * | 2019-03-28 | 2020-10-01 | 华南理工大学 | Control method, apparatus, and device for primary air of coal-fired unit |
| CN112128602A (en) * | 2020-09-25 | 2020-12-25 | 江苏方天电力技术有限公司 | Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance |
| CN112503019A (en) * | 2020-11-30 | 2021-03-16 | 华能国际电力股份有限公司营口电厂 | Desulfurization oxidation fan control system |
| CN113108307A (en) * | 2021-04-13 | 2021-07-13 | 西安热工研究院有限公司 | Primary air control system and control method for reducing hot air throttling loss of coal mill |
| CN114017793A (en) * | 2021-09-17 | 2022-02-08 | 华能国际电力股份有限公司大连电厂 | Primary air pressure control method and device |
| CN115193571A (en) * | 2022-07-08 | 2022-10-18 | 国家能源集团谏壁发电厂 | Wind pressure control method and device, storage medium and equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01269819A (en) * | 1988-04-22 | 1989-10-27 | Mitsubishi Heavy Ind Ltd | Primary ventilation system control method for coal boiler |
| JPH0320517A (en) * | 1989-06-19 | 1991-01-29 | Hokkaido Electric Power Co Inc:The | Control of mill |
| CN102798140A (en) * | 2012-06-26 | 2012-11-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Primary air flow simulation control method for coal mills of coal-fired unit |
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN103234219A (en) * | 2013-04-24 | 2013-08-07 | 广东电网公司电力科学研究院 | Circumference air quantity adjustment method and system for pulverized coal boiler after fire coal kind changing |
-
2013
- 2013-12-26 CN CN201310739782.6A patent/CN103712235B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01269819A (en) * | 1988-04-22 | 1989-10-27 | Mitsubishi Heavy Ind Ltd | Primary ventilation system control method for coal boiler |
| JPH0320517A (en) * | 1989-06-19 | 1991-01-29 | Hokkaido Electric Power Co Inc:The | Control of mill |
| CN102798140A (en) * | 2012-06-26 | 2012-11-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Primary air flow simulation control method for coal mills of coal-fired unit |
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN103234219A (en) * | 2013-04-24 | 2013-08-07 | 广东电网公司电力科学研究院 | Circumference air quantity adjustment method and system for pulverized coal boiler after fire coal kind changing |
Non-Patent Citations (2)
| Title |
|---|
| 李伟: "磨煤机风量调节优化控制措施", 《制冷空调与电力机械》, vol. 31, no. 136, 15 November 2010 (2010-11-15) * |
| 谭杰: "磨煤机一次风量测量系统改造", 《华电技术》, vol. 30, no. 2, 29 February 2008 (2008-02-29) * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238102A (en) * | 2017-05-31 | 2017-10-10 | 上海明华电力技术工程有限公司 | A kind of primary air fan RB control methods under full load mode |
| CN107238102B (en) * | 2017-05-31 | 2019-01-29 | 上海明华电力技术工程有限公司 | A kind of primary air fan RB control method under full load mode |
| WO2020191873A1 (en) * | 2019-03-28 | 2020-10-01 | 华南理工大学 | Control method, apparatus, and device for primary air of coal-fired unit |
| CN110701634A (en) * | 2019-09-18 | 2020-01-17 | 上海发电设备成套设计研究院有限责任公司 | Primary air pressure control system and control method thereof |
| CN112128602A (en) * | 2020-09-25 | 2020-12-25 | 江苏方天电力技术有限公司 | Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance |
| CN112128602B (en) * | 2020-09-25 | 2021-09-14 | 江苏方天电力技术有限公司 | Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance |
| CN112503019A (en) * | 2020-11-30 | 2021-03-16 | 华能国际电力股份有限公司营口电厂 | Desulfurization oxidation fan control system |
| CN113108307A (en) * | 2021-04-13 | 2021-07-13 | 西安热工研究院有限公司 | Primary air control system and control method for reducing hot air throttling loss of coal mill |
| CN113108307B (en) * | 2021-04-13 | 2022-09-23 | 西安热工研究院有限公司 | Primary air control system and control method for reducing hot air throttling loss of coal mill |
| CN114017793A (en) * | 2021-09-17 | 2022-02-08 | 华能国际电力股份有限公司大连电厂 | Primary air pressure control method and device |
| CN115193571A (en) * | 2022-07-08 | 2022-10-18 | 国家能源集团谏壁发电厂 | Wind pressure control method and device, storage medium and equipment |
| CN115193571B (en) * | 2022-07-08 | 2024-02-02 | 国家能源集团谏壁发电厂 | Wind pressure control method, device, storage medium and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103712235B (en) | 2016-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103712235A (en) | Primary air fan controlling method and device | |
| CN103836639B (en) | A kind of primary air fan control method based on First air burner hearth differential pressure and device | |
| CN111142377B (en) | Fuel quantity feedforward control method of coordinated control system considering operation state of coal mill | |
| CN205372921U (en) | Adaptive variable blast volume air conditioner air supply fan speed controller | |
| CN109894251B (en) | Control method, device and equipment for primary air of coal-fired unit | |
| CN107120677B (en) | Method and system for automatically controlling combustion-supporting air pressure of heating furnace | |
| CN201787823U (en) | Heat-power balancing device for sintering waste heat generating system | |
| CN104214911A (en) | Control method of compound PLC (programmable logic controller) air conditioning automatic control system in textile mill | |
| CN207317545U (en) | A kind of kiln shares flue gas system | |
| CN108415486A (en) | A kind of dynamic regulating method of high-field electrode boiler power | |
| CN109378833A (en) | A method of unit fast frequency hopping is realized by control extraction flow of steam | |
| CN205874470U (en) | Blast funnace hot blast stove optimal control system | |
| CN102032588B (en) | Controlling, adjusting and remote monitoring system for fuel gas-fired boiler | |
| CN201507945U (en) | Control, regulation and remote monitoring system for fuel/gas boilers | |
| CN107191964B (en) | A kind of method and device of the quick optimal-search control of Thermal generation unit First air | |
| CN111678339B (en) | System and method for controlling temperature in flue gas hood of sintering machine | |
| CN111750507A (en) | Air conditioner tail end wind and water linkage adjusting system and adjusting method | |
| CN112539450B (en) | Multi-strategy intelligent heat supply method based on temperature and time offset control | |
| CN103968481A (en) | Independent temperature controlling and energy saving device for subway station office platform | |
| CN107976909A (en) | Extra-supercritical unit overheating steam temperature multi objective control method | |
| CN112413639B (en) | Intelligent control method and system for combustion-supporting air volume of heating furnace group | |
| CN209512264U (en) | Fire electric heater | |
| CN111765758B (en) | System and method for controlling pressure in flue gas hood of sintering machine | |
| CN105062509A (en) | Flue suction and thermal carrier temperature control method in coke oven waste heat recovery | |
| CN112327778B (en) | Automatic primary air pressure adjusting method for thermal power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee after: Shajiao C Power Station of Guangdong Yudean Group Co., Ltd. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: Shajiao C Power Station of Guangdong Yudean Group Co., Ltd. Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |