CN102519269A - 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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- CN102519269A CN102519269A CN2011104557171A CN201110455717A CN102519269A CN 102519269 A CN102519269 A CN 102519269A CN 2011104557171 A CN2011104557171 A CN 2011104557171A CN 201110455717 A CN201110455717 A CN 201110455717A CN 102519269 A CN102519269 A CN 102519269A
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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 central cooler unloads ore control optimization method and system.
Background technology
Now, medium-and-large-sized sintering process process generally adopts annular cooler to realize sintering finished ores is cooled off, and central cooler postorder link generally is designed with a less ore deposit dashpot that unloads.The charging of this groove is determined by the withdrawal rate of central cooler.Generally relevant with the speed of the bed depth of circular cooler trolley and central cooler; The discharging of this groove generally is arranged on the plate belt feeder speed decision of its underpart through control.As shown in Figure 1.This ore deposit groove effect in technical process mainly contains 3 points, and one of which is the buffering that in continuous flow procedure, finished product mineral aggregate amount is fluctuateed.When the of short duration fault of postorder equipment, guarantee the ordinary production of previous process flow process; Its two, the buffering that the mineral blowtank of certain material level falls to the central cooler discharge reduces the possibility that the finished product ore deposit is broken into pieces, reduces the rate of return mine to a certain extent; 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, reduces rate of breakdown, improves system and is of great benefit to service life.
Usually, the cold control of unloading the ore deposit of ring is through regulating the speed (SV of plate belt feeder
Bsgk) realize.And the setting speed (SP of plate belt feeder
Bsgk) be by central cooler speed (SV
Hlj) obtain through calculating.The general ratio control mode that adopts is accomplished its calculation expression: SP
Bsgk=SV
Hlj* k.K is a proportionality coefficient in the formula, and its size is to adjust through actual production to obtain, and engineering unit concrete and that each speed adopts also has direct relation (as: central cooler speed SV
HljAdopting linear velocity still is angular speed etc.).Usually, in actual production process,, often fluctuate from the sintering deposit flow meeting of sintering machine along with the variation of sintering state.Thereby the sintering deposit thickness of circular cooler trolley also can change thereupon.At this moment, under the constant situation of central cooler speed, can cause buying securities with all one's capital and hole capital after selling all securities of the cold mineral blowtank material level of ring, bring influence to production.At this moment; Operating personnel are normally or according to the frequent resize ratio coefficient k of the cold mineral blowtank material level of current ring value, or strengthen k value, raising plate belt feeder discharging speed; The average discharging ability that makes mineral blowtank is greater than inlet amount; The material level that forms the cold mineral blowtank of ring is in low material level, even the hole capital after selling all securities state, just can guarantee long-term continuous, the runs steadily of this link.Certainly, make the cold mineral blowtank of ring be in low material level and can guarantee the continuity of producing, but the raising that can bring the sinter return fine rate increases the SINTERING PRODUCTION cost; And can reduce the automaticity of system through the frequent resize ratio coefficient of manual work, also can cause the wide fluctuations of plate belt feeder speed.Like this, encircle cold wide fluctuations of unloading the ore deposit amount, be easy to cause the fault of postorder finished product dying grain system, and influence the service life of system.
Therefore, seek a kind of can the cold mineral blowtank material level of control loop, to be that ring is cold unload the optimum target that ore control is pursued to the long-term metastable technical method that can guarantee plate belt feeder speed again.
Summary of the invention
The technical problem that the present invention will solve provides a kind of central cooler and unloads ore control optimization method and system, is used for the cold mineral blowtank material level of control loop, and improves the long-term relative stability of plate belt feeder speed.
The present invention provides a kind of central cooler to unload the ore control optimization method, comprising:
The material level that will encircle cold mineral blowtank in advance is set at a plurality of zones;
Detect T
LstThe change amount of the cold mineral blowtank material level of ring in time period;
Confirm the concrete zone that the material level of the cold mineral blowtank of current ring is in;
According to the scalar that changes of the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring, confirm parameters optimization;
Confirm the proportionality coefficient of plate belt feeder according to said parameters optimization;
Speed according to central cooler is controlled plate belt feeder speed by said proportionality coefficient.
Preferably, said a plurality of zone is specially five zones;
The step that the said material level that will encircle cold mineral blowtank in advance is set at a plurality of zones is specially:
Material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring are set in advance;
Encircle five zones of the material level of cold mineral blowtank: forcing the high zone of adjustment is that material level is greater than the first material level HH; The high zone of warning is that material level is between second material level H to the first material level HH; The normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
Preferably, saidly confirm that according to said parameters optimization the proportionality coefficient of plate belt feeder is specially:
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
Preferably, said speed according to central cooler comprises by said proportionality coefficient control plate belt feeder speed step before:
When central cooler is in operating condition, and the state that stops of plate belt feeder, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter.
Preferably, said speed according to central cooler comprises by said proportionality coefficient control plate belt feeder speed step before:
When central cooler is in halted state, and the state of plate belt feeder operation, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter S
Add
Preferably, the said scalar that changes according to the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring are confirmed parameters optimization k
OptStep specifically comprise:
System judges that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
When being in, the mineral blowtank material level warns high regional or pressure adjustment height zone, and mineral blowtank material level continuation rise, then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Adjust low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircle cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
Preferably, said method further comprises:
According to said parameters optimization k
Opt, control adjustment parameter index T
Lst
Preferably, said definite parameters optimization k
OptStep further comprise:
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
Preferably, said definite parameters optimization k
OptStep further comprise:
Judge parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in the high zone of pressure adjustment, and encircle cold mineral blowtank material level and continue rise; Or,
The mineral blowtank material level is in the pressure adjustment region, and mineral blowtank material level continuation decline,
Then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
10, unload the ore control optimization method according to the arbitrary described central cooler of claim 1 to 9, it is characterized in that said method further comprises:
To said parameters optimization k
OptCarry out the control of upper and lower limit amplitude limit.
The present invention also provides a kind of central cooler to unload the ore control optimization system, comprising:
Subregion is provided with the unit, and the material level that is used for will encircling in advance cold mineral blowtank is set at a plurality of zones;
Detecting unit is used to detect T
LstThe change amount of the cold mineral blowtank material level of ring in time period;
The unit is confirmed in the zone, is used for confirming the concrete zone that the material level of the cold mineral blowtank of current ring is in;
Parameters optimization is confirmed the unit, according to the scalar that changes of the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring, confirm parameters optimization;
Proportionality coefficient is confirmed the unit, confirms the proportionality coefficient of plate belt feeder according to said parameters optimization;
Control module is controlled plate belt feeder speed according to the speed of central cooler by said proportionality coefficient.
Preferably, said a plurality of zone is specially five zones;
Said subregion is provided with the unit and comprises that material level is demarcated subelement and subregion is provided with subelement;
Material level is demarcated subelement, is used for being provided with in advance material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring;
Subregion is provided with subelement; Be used for demarcating four material levels that encircle cold mineral blowtanks that subelement is provided with according to said material level; Confirm five zones of the material level of the cold mineral blowtank of ring: force the high zone of adjustment be material level greater than the first material level HH, warn the height zone be material level between second material level H to the first material level HH, the normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
Preferably, said proportionality coefficient is confirmed the unit, and is concrete definite according to following formula;
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k;
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
Preferably, said system further comprises:
Abnormal conditions first processing unit is used for being at central cooler the state of running, and the state that stops of plate belt feeder, and the speed that to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter.
Preferably, said system further comprises:
Abnormal conditions second processing unit is used for being in the state that stops at central cooler, and the state of plate belt feeder operation, and the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter S
Add
Preferably, said parameters optimization confirms that the unit specifically comprises:
First confirms subelement, is used for judging that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
Second definite subelement is used for being in the high regional or high zone of pressure adjustment of warning when the mineral blowtank material level, and mineral blowtank material level continuation rise, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
The 3rd confirms subelement, adjusts low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircles cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
Preferably, said parameters optimization confirms that the unit further comprises:
The parameter index adjustment unit is used for according to said parameters optimization k
Opt, control adjustment parameter index T
Lst
Preferably, said parameters optimization confirms that the unit further comprises:
The 4th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
The 5th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
Preferably, said parameters optimization confirms that the unit further comprises:
The 6th confirms subelement, is used for judging parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in to force the high zone of adjustment, and when encircling cold mineral blowtank material level and continuing to go up; Or the mineral blowtank material level is in the pressure adjustment region, and the mineral blowtank material level is when continue descending, control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
Preferably, said system further comprises: the parameters optimization amending unit is used for said parameters optimization k
OptCarry out the control of upper and lower limit amplitude limit.
Compared with prior art, the present invention has the following advantages:
The said central cooler of the embodiment of the invention unloads the ore control optimization method, because with T
LstThe concrete zone that the material level of the change amount of the cold mineral blowtank material level of ring and the cold mineral blowtank of current ring is in time period all as the precondition of control plate belt feeder speed, makes that the plate belt feeder speed controlling is more reasonable.Like this, can the cold mineral blowtank material level of fine control loop, can guarantee the long-term relative stability of plate belt feeder speed again.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.
Description of drawings
Fig. 1 is the cold miner of unloading of the existing ring principle schematic of planting;
Fig. 2 is that the said central cooler of first embodiment of the invention unloads ore control optimization method flow chart;
Fig. 3 is that the said central cooler of the embodiment of the invention unloads ore control optimization method normal process flow chart;
Fig. 4 is first kind of abnormal conditions process chart of the embodiment of the invention;
Fig. 5 is second kind of abnormal conditions process chart of the embodiment of the invention;
Fig. 6 is that the said central cooler of the embodiment of the invention unloads ore control optimization method process chart;
Fig. 7 is that the said central cooler of first embodiment of the invention unloads ore control optimization system structure chart.
The specific embodiment
The technical problem that the present invention will solve provides a kind of central cooler and unloads ore control optimization method and system, is used for the cold mineral blowtank material level of control loop, and improves the long-term relative stability of plate belt feeder speed.
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, does detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Usually, producing under the metastable situation, the feeding that encircles cold mineral blowtank is directly proportional with the speed of central cooler.Thus, for guaranteeing the relatively stable material level of the cold mineral blowtank of ring, the discharging speed of the plate belt feeder of its underpart should also be directly proportional with the speed of central cooler.But consider in the actual production process, have the variation of the feeding of the cold mineral blowtank of ring under the situation constant in central cooler speed, that the sintering amount fluctuates.To above-mentioned situation, the present invention improves the cold ore control method of unloading of existing ring.
Referring to Fig. 2, this figure is that the said central cooler of first embodiment of the invention unloads ore control optimization method flow chart.
The said central cooler of first embodiment of the invention unloads the ore control optimization method, specifically may further comprise the steps:
S100, the material level that will encircle cold mineral blowtank in advance are set at a plurality of zones.
Said a plurality of zone specifically can be five zones;
Said S100 step specifically can for:
Material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring are set in advance;
Encircle five zones of the material level of cold mineral blowtank: forcing the high zone of adjustment is that material level is greater than the first material level HH; The high zone of warning is that material level is between second material level H to the first material level HH; The normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
S200, detection T
LstThe change amount of the cold mineral blowtank material level of ring in time period.
Parameter index T
LstBe according to said parameters optimization k
OptControl adjustment.
Parameter index T
LstSpecifically can decide, generally can consider by 15 minutes according to cold mineral blowtank size of ring and sintering output.
S300, confirm the concrete zone that the material level of the cold mineral blowtank of current ring is in.
S400, according to the scalar that changes of the cold mineral blowtank material level of said ring, parameters optimization is confirmed in and the concrete zone that is in of the material level of the cold mineral blowtank of current ring.
To said parameters optimization k
OptCan also carry out the control of upper and lower limit amplitude limit.
Confirm parameters optimization k
OptStep specifically can comprise:
System judges that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
When being in, the mineral blowtank material level warns high regional or pressure adjustment height zone, and mineral blowtank material level continuation rise, then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Adjust low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircle cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
Said definite parameters optimization k
OptStep can also comprise:
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
Said definite parameters optimization k
OptStep can further include:
Judge parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in the high zone of pressure adjustment, and encircle cold mineral blowtank material level and continue rise; Or,
The mineral blowtank material level is in the pressure adjustment region, and mineral blowtank material level continuation decline,
Then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
S500, confirm the proportionality coefficient of plate belt feeder according to said parameters optimization;
Saidly confirm that according to said parameters optimization the proportionality coefficient of plate belt feeder is specially:
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
S600, according to the speed of central cooler by said proportionality coefficient control plate belt feeder speed.
The said central cooler of the embodiment of the invention unloads the ore control optimization method, because with T
LstThe concrete zone that the material level of the change amount of the cold mineral blowtank material level of ring and the cold mineral blowtank of current ring is in time period all as the precondition of control plate belt feeder speed, makes that the plate belt feeder speed controlling is more reasonable.Like this, can the cold mineral blowtank material level of fine control loop, can guarantee the long-term relative stability of plate belt feeder speed again.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 said central cooler of first embodiment of the invention unloads the ore control optimization method, can also comprise first kind of abnormal conditions processing:
When central cooler is in operating condition, and the state that stops of plate belt feeder, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter.
The said central cooler of first embodiment of the invention unloads the ore control optimization method, can also comprise second kind of abnormal conditions processing:
When central cooler is in halted state, and the state of plate belt feeder operation, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter S
Add
For the ease of those skilled in the art's understanding, specify central cooler below in conjunction with Fig. 3 and unload ore control optimization method normal process flow process.
Referring to Fig. 3, this figure is that the said central cooler of the embodiment of the invention unloads ore control optimization method normal process flow chart.
The said central cooler of the embodiment of the invention unloads ore control optimization method normal process flow process:
Detect whether be in first kind of abnormal conditions, carry out relevant detection and processing;
Detect whether be in second kind of abnormal conditions, carry out relevant detection and processing;
Judge that t0 encircled cold mineral blowtank material level and ends material level change amount L till now before the time
Chg, the change direction of the cold mineral blowtank of reflection ring and variation speed degree are degree of stability.
In addition, according to the parameters optimization adjustment at interval, obtain control adjustment parameter index T
Lst(parameters optimization the last time is adjusted to the interval of current time), the stable degree of reflection control method.
Adopting the current time to deduct parameters optimization adjusts the time for the last time and obtains: T
Lst=the current time-T
Rmb
Promptly need frequent adjustment parameters optimization under the non-shakedown when being in, system can suitably relax encircling cold control requirement of unloading the 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 procedure 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.Because frequent adjustment is unfavorable for the stability of system, its implementation effect also is difficult to obtain immediately embodying.So the present invention can suitably elongate the program execution cycle (generally about 5 minutes, especially stable in systematic comparison)
Stabilize and non-persistent scope: the change amount L that encircles cold mineral blowtank material level
ChgStable less than preestablishing value representation, otherwise be unstability.Preset value is generally decided according to the size of program execution cycle and sintering system output thereof,, can select about 3 tons at 300 tons/hour like 5 minutes cycles, output, specifically also can be according to the condition of production acquisition of adjusting.
When said material level in controlled scope, can dynamically add the long-range order execution interval, cold to unload mineral aggregate position fluctuation bigger and encircle, and material level can suitably shorten the program execution interval, the stability of so further raising system control when being in extreme position.
According to the ring cold mineral blowtank material level change amount L
ChgAnd parameters optimization k
OptAdjust frequency and revise parameters optimization k
Opt, make parameters optimization k
OptConstantly be tending towards rationally, to adapt to the dynamic change of production status.
Before the concrete handling process of explanation, at first wherein important parameter is described: T
Rmb: adjustment last time is constantly; HL
Chg: encircle cold mineral blowtank material level and allow to change the upper limit; T
Slc: the parameters optimization adjustment is the upper limit at interval; F1, f2, f3, f4: parameters optimization adjustment coefficient; Hk
Opt: parameters optimization allows the adjustment upper limit; Lk
Opt: parameters optimization allows the adjustment lower limit.
Concrete steps: the nearest t0 time period of calculating is encircled the variable quantity L of cold mineral blowtank material level earlier
Chg, and obtain parameters optimization k last time
Opt, the time interval T of adjustment
LstPrimary parameters optimization k
OptBe set to 0;
Judge that then whether the variation that encircles cold mineral blowtank material level stablizes (is variable quantity L
ChgWhether less than HL
Chg).As less (the variable quantity L of variable quantity
ChgLess than HL
Chg) time, judge again whether the mineral blowtank material level is in the high zone of pressure adjustment (also claiming pressure adjustment Gao Gaoqu) or forces adjustment low area (also claiming the pressure adjustment low district).
If force adjustment Gao Gaoqu, then k
Opt=k
Opt+ HL
Chg* f1;
If force adjustment low district, then k
Opt=k
Opt-HL
Chg* f1.
Annotate: HL
ChgBe stable setting value.
Here, adopt HL
Chg* to be used as the adjustment amount of parameters optimization be under the state of control relative equilibrium to f1, the bigger situation of the cold mineral blowtank material level deviation of ring corrected come.The value of general parameters f1 is also less than normal relatively, and this helps controlling the steady adjusting of output.
If the material level variable quantity (is variable quantity L greatly
ChgGreater than HL
Chg) time, then judge parameters optimization k
OptWhether stable, promptly whether parameters optimization adjustment last time is at interval less than the time interval (T that sets
Lst＜T
Slc).
When parameters optimization adjustment last time during, judge whether the mineral blowtank material level is in to force adjustment Gao Gaoqu, and encircle cold mineral blowtank material level and continue go up (i.e. first kind of abnormal conditions) at interval less than time interval of setting; Or, judge whether the mineral blowtank material level is in pressure and adjusts low district, and mineral blowtank material level continuation decline (i.e. second kind of abnormal conditions), be then to adopt formula: k
Opt=k
Opt+ L
Chg* f3.
Pass through L
Chg* f3 revises parameters optimization, can make the variation tendency of mineral blowtank material level obtain revising, and can make this deviating from obtain revisal again.
Wherein, the value considered of f3 is suitably bigger than normal.
Parameter f 3 is generally according to cold size and the ability of unloading the ore deposit system of ring, and the field adjustable acquisition of adjusting can be set to about 4.5.
As parameters optimization k
OptStable, i.e. parameter adjustment last time interval greater than the time interval (T that equals to set
Lst＞=T
Slc), system judges whether the cold mineral blowtank material level of ring is in the normal region, is the normal region, then: k
Opt=k
Opt+ L
Chg* f2.
Through adopting L
Chg* f2 revises parameters optimization, is used to repair T
LstThe cold mineral blowtank material level of the ring of time period is into and out of unbalanced trend.
For guaranteeing the steady output of system's control, coefficient f2 is generally less than normal relatively.Generally according to cold size and the ability of unloading the ore deposit system of ring, the field adjustable acquisition of adjusting can be set to about 3 coefficient f2
Continue to go up or encircle cold mineral blowtank material level and be in below the low district of warning and encircle cold mineral blowtank material level continuation decline when the mineral blowtank material level is in the above and mineral blowtank material level in the high district of warning, then: k
Opt=k
Opt+ L
Chg* f4.Pass through L
Chg* f4 comes parameters optimization is optimized, and can solve the variation tendency of the cold mineral blowtank material level of long-time ring.
The setting value size of coefficient f4 is moderate, and generally according to cold size and the ability of unloading the ore deposit system of ring, the field adjustable acquisition of adjusting specifically can be set to about 3.5 coefficient f4.
At last can be to parameters optimization k
OptCarry out the upper and lower limit amplitude limit.
In addition, also existing several kinds of special circumstances to system also needs to handle especially.First kind of abnormal conditions: central cooler running and plate belt feeder are in halted state (back operation short-duration failure shutdown, encircling cold mineral blowtank discharging, to stop charging normal); Second kind of abnormal conditions: central cooler shuts down (encircle cold mineral blowtank charging stop) and plate belt feeder run well (encircling the normal and charging of cold mineral blowtank discharging stops).
These two kinds of abnormal conditions happen occasionally in actual production process, if individual processing can not interfere with the effect of normal process function.
For example, will cause the material level of the cold mineral blowtank of ring sharply to rise when first kind of abnormal conditions takes place by a few minutes, and after plate belt feeder recovered normally, system possibly think that original balance is broken, and calculates the parameters optimization k well beyond normal range (NR)
OptValue is adjusted automatically and is repaired this situation and may need long time etc. system, and this will further reduce the balance adjustment ability of system's after-stage.Thus, throw off normal system handles mode, change corresponding exception handler over to these two kinds of abnormal conditions.
Referring to Fig. 4, this figure is first kind of abnormal conditions process chart of the embodiment of the invention.
The specially treated flow process of first kind of situation:
The control of plate belt feeder speed needs further to improve: SP
Bsgk=SV
Hlj* (k+k
Opt)+S
Add
S wherein
AddMaterial level is supplied when being used to revise special circumstances.
Referring to Fig. 5, this figure is second kind of abnormal conditions process chart of the embodiment of the invention.
Second kind of abnormal conditions take place, and central cooler stops and plate belt feeder is in running status.At this moment the material level that encircles cold mineral blowtank constantly descends, and the originally normal stable control of material level parameter just can not adapt to.And in fact as long as the mineral blowtank material level is not in and forces the low district of adjustment, original plate belt feeder speed remains unchanged and gets final product.
Referring to Fig. 6, this figure is that the said central cooler of the embodiment of the invention unloads ore control optimization method process chart.
Complete handling process, the output formula of employing is: SP
Bsgk=SV
Hlj* (k+k
Opt)+S
Add
Like this, can the cold mineral blowtank material level of fine control loop, can guarantee the relatively stable for a long time of plate belt feeder speed again.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 that the said central cooler of first embodiment of the invention unloads ore control optimization system structure chart.
The said central cooler of first embodiment of the invention unloads the ore control optimization system, specifically can comprise: subregion is provided with unit 11, detecting unit 12, zone and confirms that unit 13, parameters optimization confirm that unit 14, proportionality coefficient confirm unit 15 and control module 16.
Subregion is provided with unit 11, and the material level that is used for will encircling in advance cold mineral blowtank is set at a plurality of zones.
Said a plurality of zone specifically can be five zones.
Said subregion is provided with the unit and can comprises: material level is demarcated subelement and subregion is provided with subelement.
Material level is demarcated subelement, is used for being provided with in advance material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring.
Subregion is provided with subelement; Be used for demarcating four material levels that encircle cold mineral blowtanks that subelement is provided with according to said material level; Confirm five zones of the material level of the cold mineral blowtank of ring: force the high zone of adjustment be material level greater than the first material level HH, warn the height zone be material level between second material level H to the first material level HH, the normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
Detecting unit 12 is used to detect T
LstThe change amount of the cold mineral blowtank material level of ring in time period.
Parameters optimization is confirmed unit 14, according to the scalar that changes of the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring, confirm parameters optimization.
Said parameters optimization confirms that unit 14 specifically comprises:
First confirms the subelement (not shown), is used for judging that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
Second definite subelement (not shown) is used for being in the high regional or high zone of pressure adjustment of warning when the mineral blowtank material level, and mineral blowtank material level continuation rise, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
The 3rd confirms the subelement (not shown), adjusts low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircles cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
Said parameters optimization confirms that unit 14 can further include:
Parameter index adjustment unit (not shown) is used for according to said parameters optimization k
Opt, control adjustment parameter index T
Lst
Said parameters optimization confirms that unit 14 can further include:
The 4th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
The 5th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
Said parameters optimization confirms that unit 14 can further include:
The 6th confirms subelement, is used for judging parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in to force the high zone of adjustment, and when encircling cold mineral blowtank material level and continuing to go up; Or the mineral blowtank material level is in the pressure adjustment region, and the mineral blowtank material level is when continue descending, control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
Proportionality coefficient is confirmed unit 15, confirms the proportionality coefficient of plate belt feeder according to said parameters optimization.
Said proportionality coefficient is confirmed unit 15, and is concrete definite according to following formula;
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k;
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
System according to the invention can further include:
The abnormal conditions first processing unit (not shown) is used for being at central cooler the state of running, and the state that stops of plate belt feeder, and the speed that to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter.
The abnormal conditions second processing unit (not shown) is used for being in the state that stops at central cooler, and the state of plate belt feeder operation, and the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter S
Add
The said system of the embodiment of the invention can further include:
The parameters optimization amending unit is used for said parameters optimization k
OptCarry out the control of upper and lower limit amplitude limit.
The said central cooler of the embodiment of the invention unloads the ore control optimization system, owing to the T that detection is arrived
LstThe concrete zone that the material level of the cold mineral blowtank of current ring that the definite unit in the change amount of the cold mineral blowtank material level of ring and zone is confirmed in the time period is in makes that all as the precondition of control plate belt feeder speed the plate belt feeder speed controlling is more reasonable.Like this, can the cold mineral blowtank material level of fine control loop, can guarantee the long-term relative stability of plate belt feeder speed again.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 only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, all still belongs in the scope of technical scheme protection of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (20)
1. a central cooler unloads the ore control optimization method, it is characterized in that, said method comprises:
The material level that will encircle cold mineral blowtank in advance is set at a plurality of zones;
Detect T
LstThe change amount of the cold mineral blowtank material level of ring in time period;
Confirm the concrete zone that the material level of the cold mineral blowtank of current ring is in;
According to the scalar that changes of the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring, confirm parameters optimization;
Confirm the proportionality coefficient of plate belt feeder according to said parameters optimization;
Speed according to central cooler is controlled plate belt feeder speed by said proportionality coefficient.
2. central cooler according to claim 1 unloads the ore control optimization method, it is characterized in that, said a plurality of zones are specially five zones;
The step that the said material level that will encircle cold mineral blowtank in advance is set at a plurality of zones is specially:
Material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring are set in advance;
Encircle five zones of the material level of cold mineral blowtank: forcing the high zone of adjustment is that material level is greater than the first material level HH; The high zone of warning is that material level is between second material level H to the first material level HH; The normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
3. central cooler according to claim 2 unloads the ore control optimization method, it is characterized in that, saidly confirms that according to said parameters optimization the proportionality coefficient of plate belt feeder is specially:
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
4. central cooler according to claim 1 unloads the ore control optimization method, it is characterized in that, said speed according to central cooler comprises by said proportionality coefficient control plate belt feeder speed step before:
When central cooler is in operating condition, and the state that stops of plate belt feeder, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter.
5. central cooler according to claim 1 unloads the ore control optimization method, it is characterized in that, said speed according to central cooler comprises by said proportionality coefficient control plate belt feeder speed step before:
When central cooler is in halted state, and the state of plate belt feeder operation, the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supplies parameter S
Add
6. central cooler according to claim 1 unloads the ore control optimization method, it is characterized in that, the said scalar that changes according to the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring are confirmed parameters optimization k
OptStep specifically comprise:
System judges that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
When being in, the mineral blowtank material level warns high regional or pressure adjustment height zone, and mineral blowtank material level continuation rise, then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Adjust low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircle cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
7. central cooler according to claim 6 unloads the ore control optimization method, it is characterized in that, said method further comprises:
According to said parameters optimization k
Opt, control adjustment parameter index T
Lst
8. central cooler according to claim 6 unloads the ore control optimization method, it is characterized in that, said definite parameters optimization k
OptStep further comprise:
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
Judge said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
9. central cooler according to claim 6 unloads the ore control optimization method, it is characterized in that, said definite parameters optimization k
OptStep further comprise:
Judge parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in the high zone of pressure adjustment, and encircle cold mineral blowtank material level and continue rise; Or,
The mineral blowtank material level is in the pressure adjustment region, and mineral blowtank material level continuation decline,
Then control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
10. unload the ore control optimization method according to the arbitrary described central cooler of claim 1 to 9, it is characterized in that said method further comprises:
To said parameters optimization k
OptCarry out the control of upper and lower limit amplitude limit.
11. a central cooler unloads the ore control optimization system, it is characterized in that, said system comprises:
Subregion is provided with the unit, and the material level that is used for will encircling in advance cold mineral blowtank is set at a plurality of zones;
Detecting unit is used to detect T
LstThe change amount of the cold mineral blowtank material level of ring in time period;
The unit is confirmed in the zone, is used for confirming the concrete zone that the material level of the cold mineral blowtank of current ring is in;
Parameters optimization is confirmed the unit, according to the scalar that changes of the cold mineral blowtank material level of said ring, and the concrete zone that is in of the material level of the cold mineral blowtank of current ring, confirm parameters optimization;
Proportionality coefficient is confirmed the unit, confirms the proportionality coefficient of plate belt feeder according to said parameters optimization;
Control module is controlled plate belt feeder speed according to the speed of central cooler by said proportionality coefficient.
12. central cooler according to claim 11 unloads the ore control optimization system, it is characterized in that,
Said a plurality of zone is specially five zones;
Said subregion is provided with the unit and comprises that material level is demarcated subelement and subregion is provided with subelement;
Material level is demarcated subelement, is used for being provided with in advance material level---the first material level HH, the second material level H, the 3rd material level L, the 4th material level LL of four cold mineral blowtanks of ring;
Subregion is provided with subelement; Be used for demarcating four material levels that encircle cold mineral blowtanks that subelement is provided with according to said material level; Confirm five zones of the material level of the cold mineral blowtank of ring: force the high zone of adjustment be material level greater than the first material level HH, warn the height zone be material level between second material level H to the first material level HH, the normal region is that material level is between the 3rd material level L to the second material level H; The warning low area be material level between the 4th material level LL to the three material level L, forcing the adjustment low area is that material level is less than the 4th material level.
13. central cooler according to claim 12 unloads the ore control optimization system, it is characterized in that, said proportionality coefficient is confirmed the unit, and is concrete definite according to following formula;
The proportionality coefficient Ka=parameters optimization k of plate belt feeder
Opt+ k;
Wherein, the proportionality coefficient of Ka for setting, k
OptBe parameters optimization.
14. central cooler according to claim 11 unloads the ore control optimization system, it is characterized in that, said system further comprises:
Abnormal conditions first processing unit is used for being at central cooler the state of running, and the state that stops of plate belt feeder, and the speed that to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter.
15. central cooler according to claim 11 unloads the ore control optimization system, it is characterized in that, said system further comprises:
Abnormal conditions second processing unit is used for being in the state that stops at central cooler, and the state of plate belt feeder operation, and the speed that then to control said plate belt feeder speed be central cooler multiply by said proportionality coefficient adds material level and supply parameter S
Add
16. central cooler according to claim 11 unloads the ore control optimization system, it is characterized in that, said parameters optimization confirms that the unit specifically comprises:
First confirms subelement, is used for judging that the cold mineral blowtank material level of ring is in the normal region, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f2;
Second definite subelement is used for being in the high regional or high zone of pressure adjustment of warning when the mineral blowtank material level, and mineral blowtank material level continuation rise, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
The 3rd confirms subelement, adjusts low area when the cold mineral blowtank material level of ring is in the warning low area or forces, and encircles cold mineral blowtank material level and continue to descend, then: control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f4;
Wherein, f2, f4 are parameters optimization adjustment coefficient.
17. central cooler according to claim 16 unloads the ore control optimization system, it is characterized in that, said parameters optimization confirms that the unit further comprises:
The parameter index adjustment unit is used for according to said parameters optimization k
Opt, control adjustment parameter index T
Lst
18. central cooler according to claim 16 unloads the ore control optimization method, it is characterized in that, said parameters optimization confirms that the unit further comprises:
The 4th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the high zone of adjustment, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of+ring allows to change upper limit HL
Chg* f1;
The 5th confirms subelement, is used for judging said change amount L
ChgAllow to change upper limit HL less than the cold mineral blowtank material level of ring
ChgThe time, and the mineral blowtank material level is in and forces the adjustment low area, then controls parameters optimization k
Opt=last time parameters optimization k
OptThe cold mineral blowtank material level of-ring allows to change upper limit HL
Chg* f1;
Wherein, f1 is a parameters optimization adjustment coefficient.
19. central cooler according to claim 17 unloads the ore control optimization system, it is characterized in that, said parameters optimization confirms that the unit further comprises:
The 6th confirms subelement, is used for judging parameters optimization adjustment last time interval T
LstLess than the time interval T that sets
SlcThe time, judge that the mineral blowtank material level is in to force the high zone of adjustment, and when encircling cold mineral blowtank material level and continuing to go up; Or the mineral blowtank material level is in the pressure adjustment region, and the mineral blowtank material level is when continue descending, control parameters optimization k
Opt=last time parameters optimization k
OptThe change amount L of the cold mineral blowtank material level of+ring
Chg* f3;
Wherein, f3 is a parameters optimization adjustment coefficient.
20. unload the ore control optimization system according to the arbitrary described central cooler of claim 11 to 19, it is characterized in that said system further comprises: the parameters optimization amending unit is used for said parameters optimization k
OptCarry out the control of upper and lower limit amplitude limit.
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