CN102519269B - Ore unloading control optimization method for annular cooler and system - Google Patents
Ore unloading control optimization method for annular cooler and system Download PDFInfo
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- CN102519269B CN102519269B CN201110455717.1A CN201110455717A CN102519269B CN 102519269 B CN102519269 B CN 102519269B CN 201110455717 A CN201110455717 A CN 201110455717A CN 102519269 B CN102519269 B CN 102519269B
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Abstract
An ore unloading control optimization method for an annular cooler includes setting the material level of an annular cooling ore unloading groove into a plurality of regions in advance; examining a change value of the material level of the annular cooling ore unloading groove within a Tlst time interval; determining the current specific region of the material level of the annular cooling ore unloading groove; determining optimizing parameters according to the change value of the material level of the annular cooling ore unloading groove and the current specific region of the material level of the annular cooling ore unloading groove; determining scale factors of a plate feeder according to the optimizing parameters; and controlling the speed of the plate feeder according to the scale factors on the basis of the speed of the annular cooler. The ore unloading control optimization method for the annular cooler and a system are used for controlling the material level of the annular cooling ore unloading groove, and long-term relative stability of the speed of the plate feeder is improved.
Description
Technical field
The present invention relates to central cooler control technology field, particularly a kind of ore unloading control optimization method for annular cooler and system.
Background technology
Now, it is cooling that medium-and-large-sized sintering process process generally adopts annular cooler to realize sintering finished ores is carried out, and central cooler postorder link is generally designed with a less ore deposit dashpot that unloads.The charging of this groove is determined by the withdrawal rate of central cooler.General relevant with the speed of central cooler with the bed depth of circular cooler trolley; The discharging of this groove is generally arranged on the plate belt feeder speed decision of its underpart by control.As shown in Figure 1.This ore deposit groove effect in technical process mainly contains 3 points, and one is the buffering to the fluctuation of finished product mineral aggregate amount in continuous flow procedure.When the of short duration fault of postorder equipment, guarantee the normal production of previous process flow process; Its two, the buffering that the mineral blowtank of certain material level falls to central cooler discharge, reduces the possibility that finished product ore deposit is broken into pieces, reduces to a certain extent the rate of return mine; Its three, mineral blowtank is discharging stably, i.e. the steady control of plate belt feeder speed, to the steady operation of follow-up finished product clearing system, reduce rate of breakdown, improve system be of great benefit to service life.
Conventionally, encircling cold control of unloading ore deposit is the speed (SV by regulating plate belt feeder
bsgk) realize.And the setting speed (SP of plate belt feeder
bsgk) be by central cooler speed (SV
hlj) by calculating, obtain.General adoption rate control mode completes, its calculation expression: SP
bsgk=SV
hlj* k.In formula, k is proportionality coefficient, and its size is to adjust to obtain by actual production, and the engineering unit that concrete and each speed adopts also has direct relation (as: central cooler speed SV
hljadopt linear velocity or angular speed etc.).Conventionally, in actual production process, along with the variation of sintering state, from the sintering deposit flow of sintering machine, can often fluctuate.Thereby the sintering deposit thickness of circular cooler trolley also can change thereupon.At this moment, in the situation that central cooler speed is constant, can cause buying securities with all one's capital and hole capital after selling all securities of cooler feed hopper material level, to production, bring impact.At this moment, operating personnel are normally or according to the frequent resize ratio coefficient k of current cooler feed hopper material level value, strengthen k value, improve plate belt feeder discharging speed, make the average discharging ability of mineral blowtank be greater than inlet amount, form the material level of cooler feed hopper in low material level, even hole capital after selling all securities state, just can guarantee this link long-term continuously, runs steadily.Certainly, make cooler feed hopper in low material level, can guarantee the continuity of producing, but the raising that can bring sinter return fine rate increase SINTERING PRODUCTION cost; And by artificial frequent resize ratio coefficient, can reduce the automaticity of system, also can cause the wide fluctuations of plate belt feeder speed.Like this, encircle cold wide fluctuations of unloading ore deposit amount, be easy to cause the fault of postorder finished product dying grain system, and affect the service life of system.
Therefore, find one and can control cooler feed hopper material level, the long-term metastable technical method that can guarantee again plate belt feeder speed is the cold optimum target of unloading ore control pursuit of ring.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of ore unloading control optimization method for annular cooler and system, for controlling cooler feed hopper material level, and the long-term relative stability of raising plate belt feeder speed.
The invention provides a kind of ore unloading control optimization method for annular cooler, comprising:
In advance the material level of cooler feed hopper is set as to multiple regions;
Detect T
lstthe change amount of cooler feed hopper material level in time period;
The material level of determining current cooler feed hopper in concrete region;
According to the scalar that changes of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters;
According to described Optimal Parameters, determine the proportionality coefficient of plate belt feeder;
According to the speed of central cooler, press described proportionality coefficient control plate belt feeder speed.
Preferably, described multiple region is specially five regions;
The described step that in advance material level of cooler feed hopper is set as to multiple regions is specially:
Set in advance the material level of four cooler feed hoppers---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL;
Five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
Preferably, describedly according to described Optimal Parameters, determine that the proportionality coefficient of plate belt feeder is specially:
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters.
Preferably, described according to the speed of central cooler by comprising before described proportionality coefficient control plate belt feeder speed step:
When central cooler is in operating condition, and the state that stops of plate belt feeder, control speed that described plate belt feeder speed is central cooler and be multiplied by described proportionality coefficient and add material level and supply parameter.
Preferably, described according to the speed of central cooler by comprising before described proportionality coefficient control plate belt feeder speed step:
When central cooler is in halted state, and the state of plate belt feeder operation, control speed that described plate belt feeder speed is central cooler and be multiplied by described proportionality coefficient and add material level and supply parameter S
add.
Preferably, described according to the scalar that changes of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters k
optstep specifically comprise:
System judgement cooler feed hopper material level, in normal region, is controlled Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
When mineral blowtank material level is adjusted high region in warning high region or forcing, and mineral blowtank material level continuation rise, Optimal Parameters k controlled
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
When cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
Preferably, described method further comprises:
According to described Optimal Parameters k
opt, control and adjust parameter index T
lst.
Preferably, described definite Optimal Parameters k
optstep further comprise:
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
Preferably, described definite Optimal Parameters k
optstep further comprise:
Judge that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level continues to go up; Or,
Mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level continuation decline,
Control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
10, according to the arbitrary described ore unloading control optimization method for annular cooler of claim 1 to 9, it is characterized in that, described method further comprises:
To described Optimal Parameters k
optcarry out the control of upper and lower limit amplitude limit.
The present invention also provides a kind of unloading place of circular cooler ore control optimization system, comprising:
Subregion setting unit, for being set as multiple regions by the material level of cooler feed hopper in advance;
Detecting unit, for detection of T
lstthe change amount of cooler feed hopper material level in time period;
Region determining unit, for determine current cooler feed hopper material level in concrete region;
Optimal Parameters determining unit, according to the scalar that changes of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters;
Proportionality coefficient determining unit, determines the proportionality coefficient of plate belt feeder according to described Optimal Parameters;
Control module, presses described proportionality coefficient control plate belt feeder speed according to the speed of central cooler.
Preferably, described multiple region is specially five regions;
Described subregion setting unit comprises that material level is demarcated subelement and subregion arranges subelement;
Material level is demarcated subelement, for setting in advance the material level of four cooler feed hoppers---and the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL;
Subregion arranges subelement, for demarcate the material level of four cooler feed hoppers of subelement setting according to described material level, determine five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
Preferably, described proportionality coefficient determining unit, concrete definite according to following formula;
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k;
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters.
Preferably, described system further comprises:
Abnormal conditions the first processing unit, for the state in running at central cooler, and the state that stops of plate belt feeder, controls speed that described plate belt feeder speed is central cooler and is multiplied by described proportionality coefficient and adds material level and supply parameter.
Preferably, described system further comprises:
Abnormal conditions the second processing unit, for the state in stopping at central cooler, and the state of plate belt feeder operation, controls speed that described plate belt feeder speed is central cooler and is multiplied by described proportionality coefficient and adds material level and supply parameter S
add.
Preferably, described Optimal Parameters determining unit specifically comprises:
First determines subelement, for judging that cooler feed hopper material level, in normal region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
Second definite subelement, for adjusting high region when mineral blowtank material level in warning high region or forcing, and mineral blowtank material level continuation rise, control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
The 3rd definite subelement, when cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
Preferably, described Optimal Parameters determining unit further comprises:
Parameter index adjustment unit, for according to described Optimal Parameters k
opt, control and adjust parameter index T
lst.
Preferably, described Optimal Parameters determining unit further comprises:
The 4th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
The 5th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
Preferably, described Optimal Parameters determining unit further comprises:
The 6th determines subelement, for judging that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level is while continuing to go up; Or mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level is while continuing to decline, and controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
Preferably, described system further comprises: Optimal Parameters amending unit, and for to described Optimal Parameters k
optcarry out the control of upper and lower limit amplitude limit.
Compared with prior art, the present invention has the following advantages:
Ore unloading control optimization method for annular cooler described in the embodiment of the present invention, due to by T
lstin time period the change amount of cooler feed hopper material level and the material level of current cooler feed hopper in concrete region all as the precondition of control plate belt feeder speed, make the control of plate belt feeder speed more reasonable.Like this, can fine control cooler feed hopper material level, can guarantee again the long-term relative stability of plate belt feeder speed.Thus, can further reduce the rate of return mine of sintering workshop section, reduce the equipment failure rate of finished product dying grain system, improve the service life of system.
Accompanying drawing explanation
Fig. 1 is the cold miner's of the unloading skill of existing ring principle schematic;
Fig. 2 is ore unloading control optimization method for annular cooler flow chart described in first embodiment of the invention;
Fig. 3 is ore unloading control optimization method for annular cooler normal process flow chart described in the embodiment of the present invention;
Fig. 4 is embodiment of the present invention the first abnormal conditions process charts;
Fig. 5 is embodiment of the present invention the second abnormal conditions process charts;
Fig. 6 is ore unloading control optimization method for annular cooler process chart described in the embodiment of the present invention;
Fig. 7 is unloading place of circular cooler ore control optimization system structure chart described in first embodiment of the invention.
The specific embodiment
The technical problem to be solved in the present invention is to provide a kind of ore unloading control optimization method for annular cooler and system, for controlling cooler feed hopper material level, and the long-term relative stability of raising plate belt feeder speed.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Conventionally, producing in metastable situation, the feeding of cooler feed hopper is directly proportional to the speed of central cooler.Thus, for guaranteeing the relatively stable material level of cooler feed hopper, the discharging speed of the plate belt feeder of its underpart should also be directly proportional to the speed of central cooler.But considering in actual production process, there is the variation of the feeding of cooler feed hopper in, sintering amount constant in central cooler speed in the situation that of fluctuation.For above-mentioned situation, the present invention improves the cold ore control method of unloading of existing ring.
Referring to Fig. 2, this figure is ore unloading control optimization method for annular cooler flow chart described in first embodiment of the invention.
Ore unloading control optimization method for annular cooler described in first embodiment of the invention, specifically comprises the following steps:
S100, in advance the material level of cooler feed hopper is set as to multiple regions.
Described multiple region is specifically as follows five regions;
Described S100 step is specifically as follows:
Set in advance the material level of four cooler feed hoppers---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL;
Five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
S200, detection T
lstthe change amount of cooler feed hopper material level in time period.
Parameter index T
lstaccording to described Optimal Parameters k
optcontrol adjust.
Parameter index T
lstspecifically can decide according to cooler feed hopper size and sintering output, generally can consider by 15 minutes.
S300, determine current cooler feed hopper material level in concrete region.
S400, according to the scalar that changes of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters.
To described Optimal Parameters k
optcan also carry out the control of upper and lower limit amplitude limit.
Determine Optimal Parameters k
optstep specifically can comprise:
System judgement cooler feed hopper material level, in normal region, is controlled Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
When mineral blowtank material level is adjusted high region in warning high region or forcing, and mineral blowtank material level continuation rise, Optimal Parameters k controlled
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
When cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
Described definite Optimal Parameters k
optstep can also comprise:
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
Described definite Optimal Parameters k
optstep can further include:
Judge that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level continues to go up; Or,
Mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level continuation decline,
Control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
S500, according to described Optimal Parameters, determine the proportionality coefficient of plate belt feeder;
Describedly according to described Optimal Parameters, determine that the proportionality coefficient of plate belt feeder is specially:
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters.
S600, according to the speed of central cooler by described proportionality coefficient control plate belt feeder speed.
Ore unloading control optimization method for annular cooler described in the embodiment of the present invention, due to by T
lstin time period the change amount of cooler feed hopper material level and the material level of current cooler feed hopper in concrete region all as the precondition of control plate belt feeder speed, make the control of plate belt feeder speed more reasonable.Like this, can fine control cooler feed hopper material level, can guarantee again the long-term relative stability of plate belt feeder speed.Thus, can further reduce the rate of return mine of sintering workshop section, reduce the equipment failure rate of finished product dying grain system, improve the service life of system.
Ore unloading control optimization method for annular cooler described in first embodiment of the invention, can also comprise the processing of the first abnormal conditions:
When central cooler is in operating condition, and the state that stops of plate belt feeder, control speed that described plate belt feeder speed is central cooler and be multiplied by described proportionality coefficient and add material level and supply parameter.
Ore unloading control optimization method for annular cooler described in first embodiment of the invention, can also comprise the processing of the second abnormal conditions:
When central cooler is in halted state, and the state of plate belt feeder operation, control speed that described plate belt feeder speed is central cooler and be multiplied by described proportionality coefficient and add material level and supply parameter S
add.
For the ease of those skilled in the art's understanding, below in conjunction with Fig. 3, illustrate ore unloading control optimization method for annular cooler normal process flow process.
Referring to Fig. 3, this figure is ore unloading control optimization method for annular cooler normal process flow chart described in the embodiment of the present invention.
Ore unloading control optimization method for annular cooler normal process flow process described in the embodiment of the present invention:
Whether detect in the first abnormal conditions, detect accordingly and process;
Whether detect in the second abnormal conditions, detect accordingly and process;
Before the judgement t0 time, cooler feed hopper material level stops till now material level and changes variables L
chg, the change direction of reflection cooler feed hopper and variation speed degree are degree of stability.
In addition, according to Optimal Parameters, adjust interval, obtain to control and adjust parameter index T
lst(Optimal Parameters the last time is adjusted to the interval of current time), the stable degree of reflection control method.
Adopting current time to deduct Optimal Parameters adjusts the time for the last time and obtains: T
lst=current time-T
rmb.
When need frequently to adjust Optimal Parameters under non-shakedown, system can suitably be relaxed encircling cold control requirement of unloading mineral aggregate position, stablizes the control rate of plate belt feeder, realizes cold the stable of ore deposit discharging that unload of ring.
Secondly, set up the suitable program execution cycle.
Because the cold miner's of the unloading process flow of ring is a dynamic process, the present invention controls plate belt feeder speed in proportion according to the speed of central cooler.Owing to adjusting frequently the stability that is unfavorable for system, its implementation effect is also difficult to be embodied immediately.Therefore the present invention can suitably elongate the program execution cycle (generally about 5 minutes, especially stable in systematic comparison)
Stable and non-persistent scope: cooler feed hopper material level change variables L
chgbe less than that to preset value representation stable, otherwise be unstability.Preset value is generally determined according to the size of program execution cycle and sintering system output thereof, if 5 minutes cycles, output are at 300 tons/hour, can select 3 tons of left and right, specifically also can be according to the condition of production acquisition of adjusting.
When described material level is in controlled scope, can dynamically add long-range order execution interval, and encircle, cold to unload mineral aggregate position fluctuation larger, and material level is when extreme position, can suitably shorten program execution interval, can further improve like this stability of system control.
According to cooler feed hopper material level change variables L
chgand Optimal Parameters k
optadjust frequency to revise Optimal Parameters k
opt, make Optimal Parameters k
optconstantly be tending towards rationally, to adapt to the dynamic change of production status.
Before the concrete handling process of explanation, first important parameter is wherein described: T
rmb: last time time adjustment; HL
chg: cooler feed hopper material level allows to change the upper limit; T
slc: Optimal Parameters is adjusted the interval upper limit; F1, f2, f3, f4: Optimal Parameters is adjusted coefficient; Hk
opt: Optimal Parameters allows to adjust the upper limit; Lk
opt: Optimal Parameters allows to adjust lower limit.
Concrete steps: the variable quantity L that first calculates nearest t0 time period cooler feed hopper material level
chg, and obtain Optimal Parameters k last time
opt, the time interval T of adjustment
lst.Primary Optimal Parameters k
optbe set to 0;
Then judge the variation of cooler feed hopper material level whether stable (be variable quantity L
chgwhether be less than HL
chg).As less (the variable quantity L of variable quantity
chgbe less than HL
chg) time, then judge that whether mineral blowtank material level is in forcing the high region of adjustment (also claiming to force to adjust Gao Gaoqu) or forcing adjustment low area (also claiming to force to adjust Di Di district).
If force to adjust Gao Gaoqu, k
opt=k
opt+ HL
chg* f1;
If force to adjust Di Di district, k
opt=k
opt-HL
chg* f1.
Note: HL
chgfor stable setting value.
Here, adopt HL
chg* to be used as the adjustment amount of Optimal Parameters be for controlling under the state of relative equilibrium to f1, and situation larger cooler feed hopper material level deviation is corrected and come.The value of general parameters f1 is also relatively less than normal, and this is conducive to control the steady adjusting of output.
If material level variable quantity (is variable quantity L greatly
chgbe greater than HL
chg) time, judge Optimal Parameters k
optwhether stable, last time, Optimal Parameters was adjusted the time interval (T whether interval is less than setting
lst< T
slc).
When Optimal Parameters adjustment last time interval is less than the time interval of setting, judge that whether mineral blowtank material level is in forcing to adjust Gao Gaoqu, and cooler feed hopper material level continues rise (being the first abnormal conditions); Or, judge that whether mineral blowtank material level is in forcing to adjust Di Di district, and mineral blowtank material level continuation decline (being the second abnormal conditions), be to adopt formula: k
opt=k
opt+ L
chg* f3.
Pass through L
chg* f3 revises Optimal Parameters, can make the variation tendency of mineral blowtank material level be revised, and can make again this deviating from be maked corrections.
Wherein, the value of f3 should be considered suitably bigger than normal.
Parameter f 3 is generally according to cold size and the ability of unloading ore deposit system of ring, and the field adjustable acquisition of adjusting, can be set to 4.5 left and right.
As Optimal Parameters k
optstable, i.e. parameter adjustment last time interval greater than the time interval (T that equals to set
lst>=T
slc), system judges that cooler feed hopper material level, whether in normal region, is normal region: k
opt=k
opt+ L
chg* f2.
By adopting L
chg* f2 revises Optimal Parameters, for repairing T
lstthe cooler feed hopper material level of time period is into and out of unbalanced trend.
For guaranteeing the steady output of system control, coefficient f2 is generally relatively less than normal.Coefficient f2 is generally according to cold size and the ability of unloading ore deposit system of ring, and the field adjustable acquisition of adjusting, can be set to 3 left and right
When mineral blowtank material level more than warning high district and mineral blowtank material level continues to go up or cooler feed hopper material level in warning and cooler feed hopper material level continues decline: k in low the district below
opt=k
opt+ L
chg* f4.Pass through L
chg* f4 is optimized Optimal Parameters, can solve the variation tendency of long-time cooler feed hopper material level.
The setting value size of coefficient f4 is moderate, and coefficient f4 is generally according to cold size and the ability of unloading ore deposit system of ring, and the field adjustable acquisition of adjusting, specifically can be set to 3.5 left and right.
Finally can be to Optimal Parameters k
optcarry out upper and lower limit amplitude limit.
In addition, for system, also existing several special circumstances also needs to be processed especially.The first abnormal conditions: central cooler running and plate belt feeder are in halted state (rear operation short-duration failure is shut down, and it is normal that cooler feed hopper discharging stops charging); The second abnormal conditions: central cooler shuts down (cooler feed hopper charging termination) and plate belt feeder run well (cooler feed hopper discharging normal and charging stop).
These two kinds of abnormal conditions happen occasionally in actual production process, if not separately processing can interfere with the effect of normal process function.
For example, when a few minutes occur the first abnormal conditions, will cause the material level of cooler feed hopper sharply to rise, and after plate belt feeder recovers normally, system may think that original balance is broken, and calculates the Optimal Parameters k well beyond normal range (NR)
optvalue, etc. system automatically adjust repair this situation may need long time, this will further reduce the balance adjustment ability of system after-stage.Thus, for these two kinds of abnormal conditions, throw off normal system processing mode, proceed to corresponding exception handler.
Referring to Fig. 4, this figure is embodiment of the present invention the first abnormal conditions process charts.
The specially treated flow process of the first situation:
The control of plate belt feeder speed needs further to improve: SP
bsgk=SV
hlj* (k+k
opt)+S
add;
Wherein S
addwhile being used for revising special circumstances, material level is supplied.
Referring to Fig. 5, this figure is embodiment of the present invention the second abnormal conditions process charts.
The second abnormal conditions occur, central cooler stop and plate belt feeder in running status.At this moment the material level of cooler feed hopper constantly declines, and originally the stable parameter of controlling of normal material level just can not adapt to.And in fact as long as mineral blowtank material level is not adjusted Di Di district in pressure, original plate belt feeder speed remains unchanged.
Referring to Fig. 6, this figure is ore unloading control optimization method for annular cooler process chart described in the embodiment of the present invention.
Complete handling process, the output formula of employing is: SP
bsgk=SV
hlj* (k+k
opt)+S
add.
Like this, can fine control cooler feed hopper material level, can guarantee again the relatively stable for a long time of plate belt feeder speed.Thus, can further reduce the rate of return mine of sintering workshop section, reduce the equipment failure rate of finished product dying grain system, improve the service life of system.
Referring to Fig. 7, this figure is unloading place of circular cooler ore control optimization system structure chart described in first embodiment of the invention.
Unloading place of circular cooler ore control optimization system described in first embodiment of the invention, specifically can comprise: subregion setting unit 11, detecting unit 12, region determining unit 13, Optimal Parameters determining unit 14, proportionality coefficient determining unit 15 and control module 16.
Subregion setting unit 11, for being set as multiple regions by the material level of cooler feed hopper in advance.
Described multiple region is specifically as follows five regions.
Described subregion setting unit can comprise: material level is demarcated subelement and subregion arranges subelement.
Material level is demarcated subelement, for setting in advance the material level of four cooler feed hoppers---and the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL.
Subregion arranges subelement, for demarcate the material level of four cooler feed hoppers of subelement setting according to described material level, determine five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
Detecting unit 12, for detection of T
lstthe change amount of cooler feed hopper material level in time period.
Optimal Parameters determining unit 14, according to the scalar that changes of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters.
Described Optimal Parameters determining unit 14 specifically comprises:
First determines subelement (not shown), for judging that cooler feed hopper material level, in normal region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
Second definite subelement (not shown), for adjusting high region when mineral blowtank material level in warning high region or forcing, and mineral blowtank material level continuation rise, control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
The 3rd definite subelement (not shown), when cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
Described Optimal Parameters determining unit 14 can further include:
Parameter index adjustment unit (not shown), for according to described Optimal Parameters k
opt, control and adjust parameter index T
lst.
Described Optimal Parameters determining unit 14 can further include:
The 4th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
The 5th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
Described Optimal Parameters determining unit 14 can further include:
The 6th determines subelement, for judging that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level is while continuing to go up; Or mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level is while continuing to decline, and controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
Proportionality coefficient determining unit 15, determines the proportionality coefficient of plate belt feeder according to described Optimal Parameters.
Described proportionality coefficient determining unit 15, concrete definite according to following formula;
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k;
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters.
System of the present invention can further include:
Abnormal conditions the first processing unit (not shown), for the state in running at central cooler, and the state that plate belt feeder stops, controlling speed that described plate belt feeder speed is central cooler and is multiplied by described proportionality coefficient and adds material level and supply parameter.
Abnormal conditions the second processing unit (not shown), for the state in stopping at central cooler, and the state of plate belt feeder operation, controls speed that described plate belt feeder speed is central cooler and is multiplied by described proportionality coefficient and adds material level and supply parameter S
add.
Described in the embodiment of the present invention, system can further include:
Optimal Parameters amending unit, for to described Optimal Parameters k
optcarry out the control of upper and lower limit amplitude limit.
Unloading place of circular cooler ore control optimization system described in the embodiment of the present invention, due to the T that detecting unit is detected
lstthe material level of the current cooler feed hopper that the change amount of cooler feed hopper material level and region determining unit are determined in the time period in concrete region all as the precondition of control plate belt feeder speed, make the control of plate belt feeder speed more reasonable.Like this, can fine control cooler feed hopper material level, can guarantee again the long-term relative stability of plate belt feeder speed.Thus, can further reduce the rate of return mine of sintering workshop section, reduce the equipment failure rate of finished product dying grain system, improve the service life of system.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (20)
1. an ore unloading control optimization method for annular cooler, is characterized in that, described method comprises:
In advance the material level of cooler feed hopper is set as to multiple regions;
Detect T
lstthe change amount of cooler feed hopper material level in time period;
The material level of determining current cooler feed hopper in concrete region;
According to the change amount of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters;
According to described Optimal Parameters, determine the proportionality coefficient of plate belt feeder;
According to the speed of central cooler, press described proportionality coefficient control plate belt feeder speed.
2. ore unloading control optimization method for annular cooler according to claim 1, is characterized in that, described multiple regions are specially five regions;
The described step that in advance material level of cooler feed hopper is set as to multiple regions is specially:
Set in advance the material level of four cooler feed hoppers---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL;
Five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
3. ore unloading control optimization method for annular cooler according to claim 2, is characterized in that, describedly according to described Optimal Parameters, determines that the proportionality coefficient of plate belt feeder is specially:
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters, k is by the actual production proportionality coefficient obtaining of adjusting.
4. ore unloading control optimization method for annular cooler according to claim 1, is characterized in that, described according to the speed of central cooler by comprising before described proportionality coefficient control plate belt feeder speed step:
When central cooler is in operating condition, and the state that stops of plate belt feeder, control speed that described plate belt feeder speed is central cooler and be multiplied by result after described proportionality coefficient and add material level and supply parameter.
5. ore unloading control optimization method for annular cooler according to claim 1, is characterized in that, described according to the speed of central cooler by comprising before described proportionality coefficient control plate belt feeder speed step:
When central cooler is in halted state, and the state of plate belt feeder operation, control speed that described plate belt feeder speed is central cooler and be multiplied by result after described proportionality coefficient and add material level and supply parameter S
add.
6. ore unloading control optimization method for annular cooler according to claim 1, is characterized in that, described according to the change amount of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters k
optstep specifically comprise:
System judgement cooler feed hopper material level, in normal region, is controlled Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
When mineral blowtank material level is adjusted high region in warning high region or forcing, and mineral blowtank material level continuation rise, Optimal Parameters k controlled
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
When cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
7. ore unloading control optimization method for annular cooler according to claim 6, is characterized in that, described method further comprises:
According to described Optimal Parameters k
opt, control and adjust parameter index T
lst.
8. ore unloading control optimization method for annular cooler according to claim 6, is characterized in that, described definite Optimal Parameters k
optstep further comprise:
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
Described in judgement, change variables L
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
9. ore unloading control optimization method for annular cooler according to claim 6, is characterized in that, described definite Optimal Parameters k
optstep further comprise:
Judge that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level continues to go up; Or,
Mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level continuation decline,
Control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
10. according to the arbitrary described ore unloading control optimization method for annular cooler of claim 1 to 9, it is characterized in that, described method further comprises:
To described Optimal Parameters k
optcarry out the control of upper and lower limit amplitude limit.
11. 1 kinds of unloading place of circular cooler ore control optimization system, is characterized in that, described system comprises:
Subregion setting unit, for being set as multiple regions by the material level of cooler feed hopper in advance;
Detecting unit, for detection of T
lstthe change amount of cooler feed hopper material level in time period;
Region determining unit, for determine current cooler feed hopper material level in concrete region;
Optimal Parameters determining unit, according to the change amount of described cooler feed hopper material level, and the material level of current cooler feed hopper in concrete region, determine Optimal Parameters;
Proportionality coefficient determining unit, determines the proportionality coefficient of plate belt feeder according to described Optimal Parameters;
Control module, presses described proportionality coefficient control plate belt feeder speed according to the speed of central cooler.
12. unloading place of circular cooler ore control optimization system according to claim 11, is characterized in that,
Described multiple region is specially five regions;
Described subregion setting unit comprises that material level is demarcated subelement and subregion arranges subelement;
Material level is demarcated subelement, for setting in advance the material level of four cooler feed hoppers---and the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL;
Subregion arranges subelement, for demarcate the material level of four cooler feed hoppers of subelement setting according to described material level, determine five regions of the material level of cooler feed hopper: forcing to adjust high region is that material level is greater than the first material level HH, warn that high region is that material level is between the second material level H to the first material level HH, normal region is that material level is between the 3rd material level L to the second material level H, warning low area be material level between the 4th material level LL to the three material level L, force adjust low area be that material level is less than the 4th material level.
13. unloading place of circular cooler ore control optimization system according to claim 12, is characterized in that, described proportionality coefficient determining unit is concrete definite according to following formula;
The Proportional coefficient K a=Optimal Parameters k of plate belt feeder
opt+ k;
Wherein, Ka is the proportionality coefficient of setting, k
optfor Optimal Parameters, k is by the actual production proportionality coefficient obtaining of adjusting.
14. unloading place of circular cooler ore control optimization system according to claim 11, is characterized in that, described system further comprises:
Abnormal conditions the first processing unit, for the state in running at central cooler, and the state that stops of plate belt feeder, controls speed that described plate belt feeder speed is central cooler and is multiplied by result after described proportionality coefficient and adds material level and supply parameter.
15. unloading place of circular cooler ore control optimization system according to claim 11, is characterized in that, described system further comprises:
Abnormal conditions the second processing unit, for the state in stopping at central cooler, and the state of plate belt feeder operation, controls speed that described plate belt feeder speed is central cooler and is multiplied by result after described proportionality coefficient and adds material level and supply parameter S
add.
16. unloading place of circular cooler ore control optimization system according to claim 11, is characterized in that, described Optimal Parameters determining unit specifically comprises:
First determines subelement, for judging that cooler feed hopper material level, in normal region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f2;
Second definite subelement, for adjusting high region when mineral blowtank material level in warning high region or forcing, and mineral blowtank material level continuation rise, control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
The 3rd definite subelement, when cooler feed hopper material level is adjusted low area in warning low area or pressure, and cooler feed hopper material level continuation decline: control Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f4;
Wherein, f2, f4 are that Optimal Parameters is adjusted coefficient.
17. unloading place of circular cooler ore control optimization system according to claim 16, is characterized in that, described Optimal Parameters determining unit further comprises:
Parameter index adjustment unit, for according to described Optimal Parameters k
opt, control and adjust parameter index T
lst.
18. ore unloading control optimization method for annular coolers according to claim 16, is characterized in that, described Optimal Parameters determining unit further comprises:
The 4th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust high region, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level allows to change upper limit HL
chg* f1;
The 5th determines subelement, for change variables L described in judgement
chgbe less than cooler feed hopper material level and allow to change upper limit HL
chgtime, and mineral blowtank material level is in forcing to adjust low area, controls Optimal Parameters k
opt=last time Optimal Parameters k
opt-cooler feed hopper material level allows to change upper limit HL
chg* f1;
Wherein, f1 is that Optimal Parameters is adjusted coefficient.
19. unloading place of circular cooler ore control optimization system according to claim 17, is characterized in that, described Optimal Parameters determining unit further comprises:
The 6th determines subelement, for judging that last time, Optimal Parameters was adjusted interval T
lstbe less than the time interval T of setting
slctime, judge that mineral blowtank material level is in forcing to adjust high region, and cooler feed hopper material level is while continuing to go up; Or mineral blowtank material level is in forcing adjustment region, and mineral blowtank material level is while continuing to decline, and controls Optimal Parameters k
opt=last time Optimal Parameters k
opt+ cooler feed hopper material level change variables L
chg* f3;
Wherein, f3 is that Optimal Parameters is adjusted coefficient.
20. according to claim 11 to 19 arbitrary described unloading place of circular cooler ore control optimization system, it is characterized in that, described system further comprises: Optimal Parameters amending unit, and for to described Optimal Parameters k
optcarry out the control of upper and lower limit amplitude limit.
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