CN103253497B - Method and device for controlling ratio coal blending - Google Patents
Method and device for controlling ratio coal blending Download PDFInfo
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- CN103253497B CN103253497B CN201310172272.5A CN201310172272A CN103253497B CN 103253497 B CN103253497 B CN 103253497B CN 201310172272 A CN201310172272 A CN 201310172272A CN 103253497 B CN103253497 B CN 103253497B
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Abstract
The invention discloses a method and device for controlling ratio coal blending. The method for controlling the ratio coal blending includes the steps: acquiring a coal blending scheme formed according to coal blending base information input by a user, and carrying out fuzzy adjustment on real-time coal blending parameters according to the coal blending scheme and combine of real accumulative tonnage of all belt weighers within a period time. A coal blending ratio is adjusted, then stability and evenness of matching are guaranteed; the phenomena of coal piling and coal blocking are prevented from happening in the coal blending production process, wherein the phenomena of the coal piling and the coal blocking are caused by excessive coal amount; while safety production is guaranteed, coal blending having a certain loading speed is guaranteed so that coal blending operation can be finished timely; the defects that coal can not fall when a transducer works in a dead zone, and harmful effects to a motor are generated by the transducer when the transducer works under low frequency are also overcome.
Description
Technical field
The present invention relates to a kind of control method and device of ratio coal blending.
Background technology
At present, ratio coal blending all adopts the instantaneous flow of belt conveyer scale to be used as regulating foundation, is also all regulate respective flow to reach the object of control ratio in real time according to ratio preset flow in the process of the ratio of adjustment.
Due to the irregularity of feeder feeding coal, cause the instant flow rate fluctuating range of belt conveyer scale larger, instantaneous flow is adopted just to there will be the ill effect of two aspects as foundation: on the one hand, because instant flow rate can not keep certain stability and homogeneity, to cause the transient error of adjustment larger; On the other hand, instant flow rate is just regulated to cause the final cumulative errors regulated larger.
Existing most of ratio coal blending is all calculate the real-time traffic of each feeder according to the total flow of initial setting and regulate, and does not consider the total flow moment all in the fact of change, thus the space that degree of regulation is still improved.
In addition, coal blending do not consider in implementation process feeder frequency converter Dead Zone and due to coal-supplying amount too much these factors of coal piling, chute blockage, although cause the feeder when low frequency not descend coal, but also continue the frequency reducing feeder frequency converter, thus extend regulating time, and some feeders are to than already reaching the belt delivery limit during upper frequency, also continue to increase frequency.
Summary of the invention
The present invention is intended to the above problem existed for prior art, a kind of control method and device of ratio coal blending are provided, its have reduce coal blending error, improve coal blending precision, prevent feeder when low-frequency operation on the impact of motor, decrease the advantages such as regulating time.
According to an aspect of the present invention, provide a kind of control method of ratio coal blending, comprising:
The Coal Blending Schemes that acquisition is formed according to the coal blending essential information of user's input;
Tonnage is added up in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to described Coal Blending Schemes.
The coal blending essential information of described user's input comprises: target ature of coal, demand aggregate tonnage, target total flow and bandwidth.
Described Coal Blending Schemes specifically comprises: coal mixes breeding number and each coal ratio.
Described real-time Blending Parameter comprises chlorine adding ratio, total flow and coal supply frequency, wherein,
Chlorine adding ratio, refers to the coal amount ratio of different target ature of coal;
Total flow, refers to the mixed flow of different target ature of coal;
Coal supply frequency, refers to the coal-supplying amount of feeder in the unit time.
Fuzzy adjustment chlorine adding ratio is specially:
Relatively in a period of time, the reality of each belt conveyer scale adds up tonnage and error between the target tonnage formed by demand percentage and/or error rate carry out fuzzy adjustment chlorine adding ratio.
Fuzzy tuning total flow is specially:
When target total flow and the error in real time between total flow are in certain bandwidth range, then think that coal amount is stablized, do not regulate;
When error exceedes described bandwidth range, then carry out Fuzzy tuning according to the error between target total flow and real-time total flow and/or error rate.
Preferably, also comprise: the minimum regulating frequency of feeder and the highest regulating frequency are set.
According to a further aspect in the invention, provide a kind of control setup of ratio coal blending, comprising:
Acquisition module, the Coal Blending Schemes formed for the coal blending essential information obtained according to user's input;
Adjustment module, for adding up tonnage in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to described Coal Blending Schemes.
The coal blending essential information of described user's input comprises: target ature of coal, demand aggregate tonnage, target total flow and bandwidth.
Described acquisition module mixes breeding number and each coal ratio for obtaining coal.
Described real-time Blending Parameter comprises chlorine adding ratio, total flow and coal supply frequency, wherein,
Chlorine adding ratio, refers to the coal amount ratio of different target ature of coal;
Total flow, refers to the mixed flow of different target ature of coal;
Coal supply frequency, refers to the coal-supplying amount of feeder in the unit time.
Fuzzy tuning chlorine adding ratio is specially:
Relatively in a period of time, the reality of each belt conveyer scale adds up tonnage and error between the target tonnage formed by demand percentage and/or error rate carry out fuzzy adjustment chlorine adding ratio.
Fuzzy tuning total flow is specially:
When target total flow and the error in real time between total flow are in certain bandwidth range, then think that coal amount is stablized, do not regulate;
When error exceedes certain bandwidth range, then carry out Fuzzy tuning according to the error between target total flow and real-time total flow and/or error rate.
Preferably, described control setup also comprises:
Module is set, for arranging the minimum regulating frequency of feeder and the highest regulating frequency.
The control method of ratio coal blending provided by the invention and device, chlorine adding ratio is regulated to ensure stability and the homogeneity of proportioning, prevent coal amount in coal blending production process from crossing the coal piling that mostly occurs, chute blockage phenomenon, guarantee while ensuring safety in production that coal blending has certain speed of loading, coal blending operation can be completed in time, in addition, prevent frequency converter run in dead band not coal breakage and frequency converter when low-frequency operation to the harmful effect of motor.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification sheets, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification sheets, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Fig. 1 is the schematic block diagram of the ratio blending method according to one embodiment of the invention;
Fig. 2 is the schematic block diagram of the ratio coal-blending device according to another embodiment of the invention;
Fig. 3 adopts prior art to regulate the design sketch of coal blending;
Fig. 4 adopts technical scheme of the present invention to regulate the design sketch of coal blending.
Detailed description of the invention
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for instruction and explanation of the present invention, be not intended to limit the present invention, and when not conflicting, the feature in embodiments of the invention and embodiment can be combined with each other.
Embodiment one
As shown in Figure 1, the control method of the ratio coal blending that the embodiment of the present invention provides, comprises the steps:
S101, obtain coal blending essential information according to user's input and the Coal Blending Schemes that formed;
S102, add up tonnage in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to Coal Blending Schemes.
The coal blending essential information of user's input comprises: target ature of coal, demand aggregate tonnage, target total flow and bandwidth.Wherein, user's request cal val belongs to the one of target ature of coal, that is, the coal blending essential information of user's input also can be: user's request cal val, demand aggregate tonnage, target total flow and bandwidth, the coal blending essential information that system inputs according to user generates Coal Blending Schemes automatically.
Wherein, the dissimilar coal that target ature of coal refers to the difference according to cal val, moisture, ash content, volatile matter or sulphur content and distinguishes, demand aggregate tonnage refers to the weight that this coal blending needs altogether, the total flow that target total flow is planned after then referring to the mixing of several different target ature of coal.
Coal Blending Schemes described in step S102 comprises: coal mixes the information such as breeding number, each coal ratio, demand aggregate tonnage, target total flow.
Real-time Blending Parameter described in step S103 specifically comprises chlorine adding ratio, total flow and coal supply frequency, wherein,
Chlorine adding ratio refers to the coal amount ratio of different target ature of coal, and because different target ature of coal is generally loaded onto ship by different warehouses, therefore, chlorine adding ratio also can think the ratio of different warehouses coal amount;
Total flow refers to the mixed flow of different target ature of coal;
Coal supply frequency refers to the coal-supplying amount of feeder in the unit time.
Wherein, the Fuzzy tuning of chlorine adding ratio is specially:
After generating Coal Blending Schemes according to the coal blending essential information of user's input, shipment coal blending is carried out according to Coal Blending Schemes, through after a while, the reality of more each belt conveyer scale adds up tonnage and error between the target tonnage formed by demand percentage carrys out fuzzy adjustment chlorine adding ratio, also can add up tonnage by the reality of more each belt conveyer scale and error rate between the target tonnage formed by demand percentage carrys out fuzzy adjustment chlorine adding ratio.
The Fuzzy tuning of total flow and coal supply frequency is specially:
The uneven flow that can not make of coal-supplying amount due to feeder maintains on certain flow all the time, can only fluctuate up and down within the scope of one, therefore, preset certain flow bandwidth scope, within a period of time, if target total flow and the error in real time between total flow are in certain bandwidth range, so just think that coal amount is stablized, then Fuzzy tuning is not carried out to total flow, keep existing coal supply frequency;
And when target total flow and the error in real time between total flow exceed default bandwidth range, then carry out Fuzzy tuning coal supply frequency according to target total flow and the error in real time between total flow, and then adjustment total flow, also can carry out Fuzzy tuning according to target total flow and the error rate in real time between total flow.Thus while ensure that coal blending total flow, also ensure that coal blending has certain speed of loading, coal blending production task can be completed in time.
In addition, due to a feeder may be occurred in coal blending control process not produce coal, other feeders continue to increase coal output and have exceeded the carrying capacity of belt and the situation of coal piling, chute blockage occurs, therefore, the embodiment of the present invention also comprises the highest regulating frequency arranging feeder, prevents the situation occurring coal piling, chute blockage in control process.
In addition, owing to there will be the phenomenon of not coal breakage when feeder frequency converter runs in the dead band of frequency, and frequency converter can have harmful effect to motor through low-frequency operation of being everlasting, therefore, the embodiment of the present invention also comprises: the minimum regulating frequency arranging feeder, prevent frequency from regulating from 0HZ, thus decrease regulating time, improve governing speed.
Embodiment two
As shown in Figure 2, the control setup of a kind of ratio coal blending that the embodiment of the present invention provides, comprising:
Acquisition module, the Coal Blending Schemes formed for the coal blending essential information obtained according to user's input;
Adjustment module, for adding up tonnage in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to described Coal Blending Schemes.
The control process of the control setup of ratio coal blending, specific as follows:
After user inputs coal blending essential information, system generates Coal Blending Schemes automatically, the Coal Blending Schemes formed according to the coal blending essential information of user's input by the acquisition module acquisition of ratio coal blending controlling apparatus; The adjustment module of ratio coal blending controlling apparatus according to generated Coal Blending Schemes, and in conjunction with the accumulative tonnage of each belt conveyer scale reality in a period of time, carrys out the Blending Parameter that Fuzzy tuning is real-time.
Wherein, the coal blending essential information of user's input generally can comprise: the information such as target ature of coal, demand aggregate tonnage, target total flow and bandwidth, wherein user's request cal val belongs to the one of target ature of coal, the coal blending essential information of user's input also can be: the information such as the cal val of user's request, demand aggregate tonnage, target total flow and bandwidth, and system all can generate corresponding Coal Blending Schemes according to the essential information of user's input.Current existing Coal Blending System has realized generating Coal Blending Schemes according to user profile, of the present invention focusing on regulates real-time Blending Parameter, this step of Coal Blending Schemes is generated for the coal blending essential information inputted according to user and belongs to prior art, just repeat no more at this.
Wherein, the Coal Blending Schemes of generation generally can comprise: coal mixes breeding number, each coal ratio, the information such as demand aggregate tonnage, target total flow.
The real-time Blending Parameter that the embodiment of the present invention will regulate specifically comprises: chlorine adding ratio, total flow and coal supply frequency, wherein,
Chlorine adding ratio refers to the coal amount ratio of different target ature of coal;
Total flow refers to the mixed flow of different target ature of coal;
Coal supply frequency refers to the coal-supplying amount of feeder in the unit time.
Wherein, fuzzy adjustment chlorine adding ratio is specially:
After after a while, adjustment module adds up tonnage by the reality of each belt conveyer scale in more during this period of time and error between the target tonnage formed by demand percentage carrys out fuzzy adjustment chlorine adding ratio, also can add up tonnage by the reality of each belt conveyer scale in more during this period of time and error rate between the target tonnage formed by demand percentage carrys out fuzzy adjustment chlorine adding ratio.
Fuzzy adjustment total flow is specially: preset certain flow bandwidth scope, through after a while, if when target total flow and the error in real time between total flow are in the bandwidth range preset, then thinks that coal amount stable needs regulates; And when error exceedes described bandwidth range, then the adjustment module of ratio coal blending controlling apparatus carries out Fuzzy tuning according to target total flow and the error in real time between total flow, also can carry out Fuzzy tuning according to target total flow and the error rate in real time between total flow.
In addition, due to a feeder may be occurred in coal blending control process not produce coal, other feeders continue to increase coal output and have exceeded the carrying capacity of belt and the situation of coal piling, chute blockage occurs, and therefore, the embodiment of the present invention also comprises:
Module is set, for arranging the highest regulating frequency of feeder, to prevent the situation occurring coal piling, chute blockage in control process.
In addition, owing to there will be the phenomenon of not coal breakage when feeder frequency converter runs in the dead band of frequency, and frequency converter can have harmful effect to motor through low-frequency operation of being everlasting, therefore, the embodiment of the present invention arrange module also for:
The minimum regulating frequency of feeder is set, prevents frequency from regulating from 0HZ, thus decrease regulating time, improve governing speed.
In order to set forth the beneficial effect of technical solution of the present invention further, embodiments providing in prior art and adopting belt conveyer scale instant flow rate as the Contrast on effect adopting the accumulative tonnage that slides to be used as regulating index in the technique effect of regulating index and the present invention:
1, adopt belt conveyer scale instant flow rate as the technique effect of regulating index in prior art, as shown in Figure 3:
Be coal characteristic in 4850cal/g and stockyard and actual coal amount according to user's request cal val, generating scheme number is the Coal Blending Schemes of fa2012112601, and chlorine adding ratio is 55:45, and coal blending shipment is carried out in a storehouse and No. two storehouses.
The mode adopted is that the instant flow rate of belt conveyer scale is used as regulating index, and regulating cycle is 1 minute.
260 Belt Flow are set as 1200t/h, and flow bandwidth is set as 150T/H, and aggregate demand tonnage is set as 3000T.Belt speed is 4m/s.
In Fig. 3, in ratio, flow, grey figure, blue line represents aggregate-value, and red line represents instantaneous value, blue mark No. two storehouse feeder frequencies in frequency figure, a red expression storehouse feeder frequency.
2, the accumulative tonnage that slides is adopted to be used as the technique effect of regulating index in the present invention, as shown in Figure 4:
Be coal characteristic in 4900cal/g and stockyard and actual coal amount according to user's request cal val, generate the scheme that scheme number is fa2012122603, chlorine adding ratio is 20:80, and coal blending shipment is carried out in a storehouse and No. two storehouses.
The mode adopted is that the accumulative tonnage of slip in 5 minutes is used as regulating index, and regulating cycle is 1 minute.
Regulate and limit that upper frequency limit is 25HZ, lower limit is 3HZ, original frequency is respectively 15,20HZ, 260 Belt Flow are set as 1600t/h, and flow bandwidth is set as 150T/H, and aggregate demand tonnage is set as 3000T.Belt speed is 4m/s.
In Fig. 4, in ratio, flow, ash content figure, blue line represents aggregate-value, and red line represents instantaneous value, blue mark No. two storehouse feeder frequencies in frequency figure, a red expression storehouse feeder frequency.
Technique effect comparative analysis is as follows:
As can be seen from Figure 3, the regulating time of ratio is long, and the fluctuating range of flow is comparatively large, and the fluctuation of instantaneous ratio reaches ± and 10%, have also appeared vibration afterwards, and the error of accumulative ratio and preset ratio reaches 2%.
As can be seen from Figure 4, regulating time has almost just reached and require that in a regulating cycle, and total flow also reaches flow bandwidth at five regulating cycles, fluctuating range is little, instantaneous ratio all-the-time stable accumulative ratio line ± scope of 1% in, accumulative ratio is stabilized in 20:80(storehouse substantially always: No. two storehouses), error is all below 1%.
Comparison diagram 3 and Fig. 4 can find out after using new aspect ratio adjusting method, improve governing speed, the degree of regulation of instantaneous ratio, accumulative ratio all obtains larger raising, thus the rapidity of explanation coal blending, stability and dynamic characteristics all obtain larger raising.
The control method of a kind of ratio coal blending that the embodiment of the present invention provides and device, tool has the following advantages:
1, regulate chlorine adding ratio to ensure stability and the homogeneity of proportioning, prevent coal amount in coal blending production process from crossing the coal piling that mostly occurs, chute blockage phenomenon;
2, guarantee while ensuring safety in production that coal blending has certain speed of loading, coal blending operation can be completed in time;
3, prevent frequency converter run in dead band not coal breakage and frequency converter when low-frequency operation to the harmful effect of motor.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. a control method for ratio coal blending, is characterized in that, comprising:
The Coal Blending Schemes that acquisition is formed according to the coal blending essential information of user's input;
Tonnage is added up in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to described Coal Blending Schemes;
Wherein, the coal blending essential information of described user's input comprises: target ature of coal, demand aggregate tonnage, target total flow and bandwidth;
Described Coal Blending Schemes comprises: coal mixes breeding number and each coal ratio, wherein, described real-time Blending Parameter comprises chlorine adding ratio, total flow and coal supply frequency, chlorine adding ratio refers to the coal amount ratio of different target ature of coal, total flow refers to the mixed flow of different target ature of coal, coal supply frequency, refers to the coal-supplying amount of feeder in the unit time;
Fuzzy tuning chlorine adding ratio is specially: the reality comparing each belt conveyer scale in a period of time adds up tonnage and error between the target tonnage formed by demand percentage and/or error rate carry out fuzzy adjustment chlorine adding ratio;
Fuzzy tuning total flow is specially: when target total flow and the error in real time between total flow are in certain bandwidth range, then think that coal amount is stablized, do not regulate; When error exceedes described bandwidth range, then carry out Fuzzy tuning according to the error between target total flow and real-time total flow and/or error rate.
2. the method for claim 1, is characterized in that, also comprises: arrange the minimum regulating frequency of feeder and the highest regulating frequency.
3. a control setup for ratio coal blending, is characterized in that, comprising:
Acquisition module, the Coal Blending Schemes formed for the coal blending essential information obtained according to user's input;
Adjustment module, for adding up tonnage in conjunction with the reality in each belt conveyer scale a period of time, the Blending Parameter that fuzzy adjustment is real-time according to described Coal Blending Schemes;
Wherein, the coal blending essential information of described user's input comprises: target ature of coal, demand aggregate tonnage, target total flow and bandwidth;
Described Coal Blending Schemes comprises: coal mixes breeding number and each coal ratio; Described real-time Blending Parameter comprises chlorine adding ratio, total flow and coal supply frequency, wherein chlorine adding ratio refers to the coal amount ratio of different target ature of coal, total flow refers to the mixed flow of different target ature of coal, and coal supply frequency refers to the coal-supplying amount of feeder in the unit time;
Fuzzy tuning chlorine adding ratio is specially: the reality comparing each belt conveyer scale in a period of time adds up tonnage and error between the target tonnage formed by demand percentage and/or error rate carry out fuzzy adjustment chlorine adding ratio;
Fuzzy tuning total flow is specially: when target total flow and the error in real time between total flow are in certain bandwidth range, then think that coal amount is stablized, do not regulate; When error exceedes certain bandwidth range, then carry out Fuzzy tuning according to the error between target total flow and real-time total flow and/or error rate.
4. device as claimed in claim 3, it is characterized in that, described control setup also comprises:
Module is set, for arranging the minimum regulating frequency of feeder and the highest regulating frequency.
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| CN107274027A (en) * | 2017-06-22 | 2017-10-20 | 湖南华润电力鲤鱼江有限公司 | A kind of many coal coal mixing combustion optimization methods of coal unit |
| CN110094753A (en) * | 2019-05-29 | 2019-08-06 | 北京国电新创科技有限公司 | Coal-blending device and method |
| CN112009998B (en) * | 2019-05-29 | 2022-05-17 | 天津中新智冠信息技术有限公司 | Coal blending device and system applied to industrial production |
| CN111689178A (en) * | 2020-05-19 | 2020-09-22 | 神华粤电珠海港煤炭码头有限责任公司 | Ship loader for multi-belt-line coal blending and refined coal blending transformation system thereof |
| CN112163764A (en) * | 2020-09-25 | 2021-01-01 | 中国神华能源股份有限公司哈尔乌素露天煤矿 | Coal feeder scheduling method, storage medium and system based on coal blending |
| CN114538124B (en) * | 2022-03-22 | 2023-01-03 | 乌海市榕鑫能源实业有限责任公司 | Intelligent coal blending process based on multifunctional weighing display controller |
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| CN201565282U (en) * | 2009-09-07 | 2010-09-01 | 中港印能源集团有限公司 | Coal blending system and feeder applied in coal blending system |
| CN102765608A (en) * | 2011-05-06 | 2012-11-07 | 韦善兵 | Coal dressing and blending system based on FRID (radio frequency identification) |
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