CN1249211A - Automatic control method for pulverizing system of storage-type ball grinding mill - Google Patents
Automatic control method for pulverizing system of storage-type ball grinding mill Download PDFInfo
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Abstract
An automatic control method for the storage-type pulverizing system with ball grinding mill, which is used in large coal-fired power plant, has multiple functions including the automatic regulation of the open degrees of coal feeder and hot air gate and the automatic control of air quantity. Based on the running mechanism of pulverizing system, the universal PID control algorithm is used for realizing open and stable control, resulting in optimal working condition, higher quality of coal powder and less disturbance to combustion in boiler.
Description
The present invention relates to be mainly used in large-scale coal fired thermal power plant combustion powder stove, with raw coal grind into dried powder send into boiler for gas burning, weary as tertiary air or wind and be provided with from mill exhauster be exported to the coal pulverizer inlet reduced air the autocontrol method of pulverizing system of storage-type ball grinding mill (hereinafter to be referred as pulverized coal preparation system).
The automation issues of pulverized coal preparation system is a technical barrier of failing to solve, perplex the automatic technology personnel of China power plant in decades.Along with economic model is changed to intensive style by extensive style, the more and more necessary that pulverized coal preparation system is saved energy and reduce the cost, increased efficiency by downsizing payrolls is outstanding.By realizing that automation can realize increasing efficiency by downsizing payrolls on the one hand, can also realize that on the other hand stable optimization of pulverized coal preparation system moves, and realizes many-sided technical economic benefits such as energy-saving and cost-reducing." China Power " 96 year first phase and 98 year third phase have been delivered " level of material for ball mill monitoring and milling system optimized operation " and " ball mill computer control system " two pieces of articles respectively.These two pieces of documents are reflections of the prior art level of pulverized coal preparation system control technology research and development in recent years and application.The former has only realized that coal supply controls automatically, does not realize the automatic control of wind.Though the latter has realized that the feeder aperture is regulated automatically, hot blast door aperture is regulated automatically and ventilation is controlled automatically, but be based on certain fuzzy Judgment or experience and judge a kind of indirect control scheme that realizes by off-gauge control scheme, product introduction " ball mill Fuzzy control system " that can Great Wall control systems engineering (CSE) company in institute of Huabei Electric Power College electricity section, Beijing also introduced and above-mentioned second kind of document category with technical scheme, these two kinds of technical schemes have roughly the same all adopted fuzzy control strategy: below be referred to as fuzzy control.Prior art has been represented in fuzzy control, but owing to be based on experience, has following problem: since with the coal pulverizer coal load quantity as non-quantitative, cause the operating condition instability; Adopt fuzzy algorithmic approach, have certain randomness, parameter fluctuation is big, and the stability of a system and economy guarantee that degree is low, and fineness of pulverized coal and humidity instability are big to the boiler combustion disturbance; Be difficult for adapting to different pulverized coal preparation systems, different appointed conditions and different ature of coal conditions, practical application software will be at concrete object summing up experience establishment, and difficulty is big, standardization is poor, is difficult to guarantee steady in a long-term good control quality.Its substantial limitations is under the condition of the operation mechanism that does not have to realize scientifically to analyze pulverized coal preparation system, the wrong control strategy of foundation.Although therefore fuzzy control tens tame large thermal power plants application throughout the country, and evaluation meeting and the promotion conference of the multiple pattern of power plant, provincial, national power department tissue have been passed through, but practical application effect is still unsatisfactory, all the time being in to improve and improving among the process, only is a kind of progress of growing out of nothing therefore.
Fuzzy control is the control strategy that is based upon on the technology prejudice, prejudice one promptly: multivariable coupling, multivariable time-lag and time-varying model are the main difficulties of pulverized coal preparation system control.This prejudice is thermal power plant automation professional and technical personnel's common recognition in decades, why is again prejudice? how does this technology prejudice form? we think that this is owing to technical staff's theory is not goed deep into the perceptual knowledge that the analysis of rigorous and scientific ground draws to phenomenon down from the way of thinking guide of reality.Obviously this understanding and another prior theory: pulverized coal preparation system exert oneself by three exert oneself constitute be that coal-grinding is exerted oneself, drying is exerted oneself, ventilate exert oneself between the due contact of shortage.
In fact, because pulverized coal preparation system is a quite complicated system, be mistaken as easily is multi-variable system, the variable of actual pulverized coal preparation system can be divided into four classes: the first kind is that ature of coal is the powder process physical characteristic of coal, comprise external moisture content, the grindability coefficient, granularity etc., belong to independent variable, second class is a dependent variable, comprise the coal pulverizer coal load quantity, temperature, pressure, air quantity, exert oneself, electric current etc., the 3rd class is a regulated quantity, comprise the feeder aperture, each air door baffle opening, mill separator baffle plate angle etc., the 4th class is slow independent variable, comprise coal pulverizer steel ball amount, the degree of wear of liner plate, the degree of wear of mill exhauster blade, the equipment attritions such as wearing and tearing of pipe network and baffle plate change, and the variation of changes in environmental conditions such as atmospheric temperature causes the variation of raw coal temperature and air themperature in addition.This shows that the angle of pulverized coal preparation system Automatic Control Strategy has only ature of coal to be only independent variable, think that the multivariable coupling is wrong.Secondly, since the coal pulverizer coal load quantity cause greatly, simultaneously system's thermal capacity big, under not having the condition of monitoring means because the significantly variation of coal pulverizer coal load quantity stickiness and time-varying model when system is presented, therefore if the coal pulverizer coal load quantity is constant then pulverized coal preparation system no longer is a time-varying model, and stickiness when having only temperature to have.
Prejudice two is promptly: keep EIAJ need change the coal capcity of coal pulverizer when ature of coal changes for making grinding machine, in fact because raw coal enters the very fast approaching dried powder of physical characteristic that promptly can become behind the grinding machine, therefore the best coal capcity and the ball load of grinding machine are constant substantially, automatic control scheme is treated the coal capcity definite value and not only can not made grinding machine be stabilized in optimum condition as variable, and destroyed the equilibrium relation and the stability of whole pulverized coal preparation system, cause control system from disturbing instability.
In sum, to control prior art automatically be that fuzzy control is based on a kind of imitation operations staff operating habit of technology prejudice and the control scheme of experience to pulverized coal preparation system.We think that from control strategy pulverized coal preparation system is the controlled device of the many dependent variables of single independent variable, naive model.The operation mechanism and the control strategy of pulverized coal preparation system are summarized as follows: at first, as operation mechanism, three exert oneself greatly should be according to importance ranking: coal-grinding exerts oneself, ventilate exert oneself, drying exerts oneself; Pulverized coal preparation system optimized operation mode should realize coal-grinding exert oneself with keep constant best steel ball amount and constant best coal capcity realize constant optimum condition (EIAJ or maximum economic rating), ventilate exert oneself should keep ventilation constant in optimal ventilation amount (stable, qualified fineness of pulverized coal), drying is exerted oneself and dry load keeps balance (stable, the higher one's intention as revealed in what one says temperature that grinds realizes stable, qualified coal dust humidity).As control strategy, the coal-grinding operating mode: the steel ball amount should have the assurance means of standard, the measurement of coal capcity requires stability to reach specification requirement, and degree of accuracy index major requirement measurement result uniformity guarantees that by the fast automatic adjusting of feeder coal pulverizer is at constant duty; The ventilation operating mode: to keep being grinding into mouthful negative pressure under mouthful condition that later wind-warm syndrome is constant constant constant with basic realization ventilation keeping grinding, and makes decoupling zero between accent wind and the accent coal because ventilation is stable; Dry operating mode: the slow variation with ature of coal is slowly regulated, and with drying load maintenance balance but because the drying load excursion is very big, the impossible balance that keeps should approve that wind-warm syndrome descends at this moment when load is excessive.
Purpose of the present invention: according to the creative research achievement of pulverized coal preparation system operation mechanism, overcome technology prejudice, a kind of middle automatic control method for pulverizing system of storage-type ball grinding mill is provided, adopt general classics control pid control algorithm, realize wide-open control scheme and more stable control effect.
The present invention is achieved in that middle automatic control method for pulverizing system of storage-type ball grinding mill, comprise that the feeder aperture regulates automatically, hot blast door aperture is regulated automatically and ventilation is controlled automatically, the self-regulating target of feeder aperture is that control coal pulverizer coal load quantity is a definite value, the self-regulating target of hot blast door aperture is that control grinds the one's intention as revealed in what one says temperature for definite value or as far as possible near the upper limit, it is condition to guarantee that entrance negative pressure does not become malleation that while hot blast door carries out the aperture upper limit, and ventilation is controlled automatically to be grinding into a mouthful warm air door, recycling air door or being grinding into mouthful cold-air flap is that regulated quantity control is grinding into a mouthful negative pressure.
The detection of described coal pulverizer coal load quantity is to adopt ball mill audio frequency material-level detecting device.
Automatic control method for pulverizing system is provided with the operation card, operation card record basic fundamental condition, it comprises the aperture that do not participate in self-regulating regulated quantity, participate in self-regulating regulated quantity in the first definite value of the value of cheating, control target variable of the aperture of pulverized coal preparation system starting process, drops into and operates according to moving card before regulating automatically.
The no-load current value of described operation card record coal pulverizer in servicely remains unchanged as the foundation of adding the steel ball amount with it.
Because the coal pulverizer coal load quantity is controlled in definite value, pulverized coal preparation system system coal output with feed the coal amount and equate substantially all the time, thereby all can cause the variation of the reciprocal certain amplitude of system coal output to cause the variation that feeds coal amount same magnitude because ature of coal changes the variation of the coal-grinding, drying or the ventilation loads that cause, therefore realize that real-time dynamic equilibrium becomes the most basic condition of pulverized coal preparation system stable operation.Pulverized coal preparation system becomes a self-balancing system, thereby has autostability.According to the present invention pulverized coal preparation system three exerted oneself greatly and to be analyzed as follows:
Coal-grinding is exerted oneself and is realized constant maximum duty: can realize the constant of steel ball amount according to the constant steel ball of adding of mill no-load current, therefore the ball amount of depositing and the coal load quantity of coal pulverizer all are stable, realized that like this coal-grinding operating mode is stable, because what coal-grinding efficient depended primarily on coal pulverizer deposits ball amount and coal load quantity, the ature of coal variable effect is very little, can remain at maximum or most economical so coal-grinding is exerted oneself.
Ventilation is exerted oneself and realized constant best air quantity: because the ball amount of depositing and the coal load quantity of coal pulverizer all are stable, so coal pulverizer also is stable to the influence of the ventilation condition of pulverized coal preparation system.Adding that the aperture that does not participate in self-regulating regulated quantity is in service operates according to the operation card, also is constant substantially, therefore, the hot blast door and be grinding into mouthful negative pressure adjustment doors aperture when constant the ventilation of pulverized coal preparation system be stable.All controlled by strictness owing to grind the gentle entrance negative pressure of one's intention as revealed in what one says, when the hot blast door was regulated, entrance negative pressure was regulated air quantity has been carried out Compensation Regulation, so the pulverized coal preparation system ventilation also is basicly stable.
Drying exert oneself realization and balancing the load or maximum can't balance the time: owing to realized real-time dynamic equilibrium, the progress of matter has also taken place in the equilibrium relation that drying is exerted oneself.Thereby grind a mouthful variations in temperature and cause that making the coal quantitative changeization causes feeding coal amount constant amplitude and change because drying load changes to cause, the result exerts oneself and drying load balance again automatically on new temperature spot drying.To grind the one's intention as revealed in what one says temperature is that definite value is regulated the hot blast door and can be utilized the adjustable range of hot blast door to make drying exert oneself and load to keep balance at any time.When hot blast door aperture is limited by upper limit,, then form maximum drying and exert oneself if the negative pressure adjustment doors is closed.
Foregoing has been set forth the present invention can realize substantially that pulverized coal preparation system three exerts oneself greatly all in optimum condition.When the external moisture content of coal when changing in a big way, in order to guarantee that certain coal dust humidity is necessary to adjust the pulverized coal preparation system drying and exerts oneself.Slowly regulate the hot blast door, then change drying and exert oneself, keep grinding the one's intention as revealed in what one says temperature and can guarantee the coal dust moisture stable, be grinding into mouthful negative pressure and ventilation changes but caused simultaneously.When hot blast door aperture increases, be grinding into mouthful negative pressure and may become malleation, so hot blast door aperture upper limit can guarantee negative pressure.Because the measurement of band powder pulverized coal preparation system ventilation acquires a certain degree of difficulty in the wind, to be grinding into a mouthful warm air door, recirculation air door or to be grinding into mouthful cold-air flap is regulated quantity, make by quick adjustment and to be grinding into a mouthful negative pressure and to be controlled at certain limit, can realize the hot blast door is slowly regulated the compensation that causes air quantity to change, make air quantity constant substantially.This air quantity compensation control that utilizes negative pressure has simple advantage and has guaranteed the coal pulverizer entrance negative pressure simultaneously, is the scheme of killing two birds with one stone.Because the hot blast door is regulated to adopt at a slow speed and regulated, the negative pressure adjustment doors adopts quick adjustment, so realized the decoupling zero between wind-warm syndrome and the air quantity control when realizing air quantity compensation control.In addition, because the time constant of coal pulverizer coal capcity is very big, air quantity is basicly stable, so also realized decoupling zero between wind control and the coal control.
The invention has the advantages that: realized and to have controlled automatically based on the pulverized coal preparation system of classical control theory, the opening of control scheme and more stable control effect have been realized, pulverized coal preparation system three is exerted oneself greatly remain at optimum condition, reduced randomness, improved economy, improved quality of pc, reduced disturbance boiler combustion, be beneficial to and apply and safeguard, can realize further that on this basis the overall process that comprises the start-stop process controls automatically.
Embodiments of the invention:
Adopt ball mill audio frequency material level testing product,, realize that the ball mill coal capcity is the detection of material level as the TCS-200 of Tian-an Intelligence Tech. Co., Ltd level of material for ball mill supervising device, STA-2 ball mill audio sensor.Because audio sensor is installed on and is equivalent to grinding cylinder 1/3rd places, raw coal is through fragmentation fully and dry the processing, so the variation of raw coal ature of coal can be ignored fully to the influence of measuring.Because the steel ball amount also is the constant influence of steel ball quantitative changeization to certainty of measurement that therefore also do not exist.
Because DCS is the main separation control scheme of large electric power plant unit, so adopting DCS is that Distributed Control System realizes control strategy of the present invention, the number of pulverized coal preparation system can be adopted, be integrated into a unified system along various automation functions such as control, automatic adjustings, be a kind of embodiment preferred.
Ball mill audio frequency material level testing product can be the standard signal input DCS of 4-20mA with the material level signal transition.
By realizing to the DCS configuration:
With the ball mill coal load quantity is the feeder aperture PID automatic adjustment circuit of definite value, material level definite value 20-28%, proportional band 0.2-1.0, differential multiplication factor 0.5-2.0, derivative time 10-30 second, time of integration 200-800 second, it is the 5-10 damping of second that output adds the time constant;
Grinding the hot blast door aperture PID automatic adjustment circuit that the one's intention as revealed in what one says temperature is a definite value (or near upper limit) as far as possible, proportional band 1.0-10.0, differential multiplication factor 0.5-2.0, derivative time 10-30 second, time of integration 100-300 second; It is the 50-100 damping of second that output adds the time constant; Simultaneously the PID computing after, add a logic switch, when being grinding into mouthful negative pressure less than 250Pa if PID operation result output valve greater than last time output valve then keep output valve last time, realize that with the constant malleation of assurance entrance negative pressure be that condition is carried out the aperture upper limit to the hot blast door.
To be grinding into mouthful negative pressure is that definite value is to be grinding into a mouthful warm air door, recirculation air door or to be grinding into the PID automatic adjustment circuit that mouthful cold-air flap is a regulated quantity, negative pressure definite value-400Pa, proportional band 0.2-1.0, differential multiplication factor 0.1-0.5, derivative time 1-3 second, the time of integration is more than 800 seconds, it is the 5-10 damping of second that input adds the time constant, and it is the 1-10 damping of second that output adds the time constant.Be grinding into a mouthful warm air door, recirculation air door or be grinding into the selection foundation of mouthful cold-air flap: a mouthful warm air door should be selected to be grinding into by the system of transporting pulverized coal with exhaust gas because the pulverized coal preparation system ventilation constant the time reduced air constant like this to pulverized coal preparation system stablize and weary throughput stablize all favourable; The system of pulverized coal carried by hot air does not generally establish and is grinding into a mouthful warm air door, is grinding into a mouthful cold-air flap owing to be generally raising boiler overall thermal efficient complete shut-down, so should select the recirculation air door, weary like this throughput changes.
Do not participate in self-regulating regulated quantity aperture, participate in self-regulating regulated quantity in the aperture initial value of pulverized coal preparation system starting process, the definite value of control target variable, be recorded on the operation card as the basic fundamental condition, drop into to regulate automatically before and operate according to the operation card.System for transporting pulverized coal with exhaust gas, the aperture that does not participate in self-regulating regulated quantity comprises mill exhauster inlet baffle, recirculation door, cold-air flap, mill exhauster inlet hot blast door, warm air door and total air door, participate in self-regulating regulated quantity and comprise feeder at the aperture initial value of pulverized coal preparation system starting process, be grinding into a mouthful hot blast door, warm air door, the definite value of control target variable comprises the definite value of three automatic adjustment circuits.System for pulverized coal carried by hot air, the aperture that does not participate in self-regulating regulated quantity comprises mill exhauster inlet baffle, cold-air flap, participate in self-regulating regulated quantity and comprise feeder at the aperture initial value of pulverized coal preparation system starting process, be grinding into a mouthful hot blast door, recycle air door, the definite value of control target variable comprises the definite value of three automatic adjustment circuits.
The operation card also will write down coal pulverizer no-load current value, in servicely remains unchanged as the foundation of adding the steel ball amount with it.Coal pulverizer no-load current value should be input among the DCS and add damping cancellation transient fluctuation so that observe, write down and relatively, generally before grinding machine is stopped transport the coal of depositing in the grinding machine is pumped, can the motionless standard for pumping of rough segmentation device powder retrieving pipe flapper.
The suitable control of pulverized coal preparation system start-stop is a mature technology, and emphasis of the present invention is to solve automatic adjusting problem, can and regulate being connected as a single entity the suitable control of start-stop automatically according to the concrete condition of pulverized coal preparation system, thus the Automatic Control of realization pulverized coal preparation system overall process.With the pulverized coal carried by hot air system is example, and starting process can judge that according to certain simple condition dropping into three the tunnel automatically regulates automatically by DCS by following order; Earlier with hot blast Men Kaizhi initial opening, again throw be grinding into mouthful negative pressure automatically, wait for grind mouthful temperature near definite value, throw grind mouthful temperature automatically, with feeder open to initial opening, wait for material level near the material level definite value, feed intake the position automatically.
The operation card is the basis and the supplementary means of automatically control, makes pulverized coal preparation system in-house facility condition more stable and can adjust the requirement that makes it more near optimum condition where necessary by carrying out the operation card.The operation card should be in operation according to the variation of condition and perfect needs and adjust and revise, and is optimizing operating mode stable operation to guarantee pulverized coal preparation system.
Also can adopt advanced PLC for the Pump for Medium and Small Power Generating Set that does not adopt the DCS control system is that Programmable Logic Controller is realized the present invention.
Claims (4)
1, middle automatic control method for pulverizing system of storage-type ball grinding mill, comprise that the feeder aperture regulates automatically, hot blast door aperture is regulated automatically and ventilation is controlled automatically, it is characterized in that: the self-regulating target of feeder aperture is that control coal pulverizer coal load quantity is a definite value, the self-regulating target of hot blast door aperture is that control grinds the one's intention as revealed in what one says temperature for definite value or as far as possible near the upper limit, it is condition to guarantee that entrance negative pressure does not become malleation that while hot blast door carries out the aperture upper limit, and ventilation is controlled automatically to be grinding into a mouthful warm air door, recycling air door or being grinding into mouthful cold-air flap is that regulated quantity control is grinding into a mouthful negative pressure.
2, automatic control method for pulverizing system as claimed in claim 1 is characterized in that: the detection of described coal pulverizer coal load quantity is to adopt ball mill audio frequency material-level detecting device.
3, the autocontrol method of pulverized coal preparation system as claimed in claim 1, it is characterized in that: automatic control method for pulverizing system is provided with the operation card, operation card record basic fundamental condition, it comprises the aperture that do not participate in self-regulating regulated quantity, participates in self-regulating regulated quantity in the aperture initial value of pulverized coal preparation system starting process, the definite value of control target variable, drops into and operates according to the operation card before regulating automatically.
4, automatic control method for pulverizing system as claimed in claim 3 is characterized in that: the no-load current value of described operation card record coal pulverizer in servicely remains unchanged as the foundation of adding the steel ball amount with it.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 98112982 CN1249211A (en) | 1998-09-28 | 1998-09-28 | Automatic control method for pulverizing system of storage-type ball grinding mill |
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| CN 98112982 CN1249211A (en) | 1998-09-28 | 1998-09-28 | Automatic control method for pulverizing system of storage-type ball grinding mill |
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| CN 98112982 Pending CN1249211A (en) | 1998-09-28 | 1998-09-28 | Automatic control method for pulverizing system of storage-type ball grinding mill |
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Cited By (15)
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| CN102600958A (en) * | 2012-03-30 | 2012-07-25 | 西安艾贝尔科技发展有限公司 | Dynamical system for loadage of grinding body in cylinder type ball mill and application method of dynamical system |
| CN103331204A (en) * | 2013-06-26 | 2013-10-02 | 中冶南方工程技术有限公司 | Control method of medium-speed mill of blast furnace coal injection and pulverizing system |
| CN103721833A (en) * | 2013-12-30 | 2014-04-16 | 广东电网公司电力科学研究院 | Linkage control method, linkage control system and linkage control device for inlet air pressure and capacity air volume of coal mill |
| CN105057078A (en) * | 2015-07-10 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Operational method for preventing mill of coal mill from being blocked |
| CN105135460A (en) * | 2015-09-24 | 2015-12-09 | 中国大唐集团科学技术研究院有限公司 | Pulverizing system air temperature regulating system |
| CN107297269A (en) * | 2017-08-29 | 2017-10-27 | 柴庆宣 | The control method of Material Level In Ball Mills |
| CN108325730A (en) * | 2018-04-13 | 2018-07-27 | 中国神华能源股份有限公司 | The method and apparatus for controlling pulverized coal preparation system |
| CN108393146A (en) * | 2018-05-11 | 2018-08-14 | 东北大学 | A kind of ball mill pulverizing system adaptive optimal decoupling control method |
| CN109174423A (en) * | 2018-09-18 | 2019-01-11 | 国电龙源节能技术有限公司 | Pulverizer outlet temperature control system and method based on fineness of pulverized coal on-line tuning |
| CN109847866A (en) * | 2019-04-23 | 2019-06-07 | 山东钢铁股份有限公司 | A kind of grinding machine ball adding control method and system |
| CN110404661A (en) * | 2019-07-27 | 2019-11-05 | 沛县祥龙矿山机械配件有限公司 | A kind of autocontrol method of thermal power plant ball mill pulverizing system |
| CN110614156A (en) * | 2019-09-11 | 2019-12-27 | 中再生纽维尔资源回收设备（江苏）有限公司 | Crusher system control method based on PID algorithm |
| CN110947506A (en) * | 2019-12-20 | 2020-04-03 | 华润电力技术研究院有限公司 | Coal mill control method and equipment |
| CN112588424A (en) * | 2020-10-19 | 2021-04-02 | 湖州师范学院 | Ball milling and pulverizing system effective control method based on cloud intelligent model |
| CN115283094A (en) * | 2022-07-06 | 2022-11-04 | 国能龙源环保有限公司 | Method and device for controlling number of steel balls of ball mill, electronic equipment and storage medium |
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1998
- 1998-09-28 CN CN 98112982 patent/CN1249211A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102600958A (en) * | 2012-03-30 | 2012-07-25 | 西安艾贝尔科技发展有限公司 | Dynamical system for loadage of grinding body in cylinder type ball mill and application method of dynamical system |
| CN102600958B (en) * | 2012-03-30 | 2014-08-27 | 西安艾贝尔科技发展有限公司 | Method for controlling loadage of grinding body in cylinder type ball mill |
| CN103331204A (en) * | 2013-06-26 | 2013-10-02 | 中冶南方工程技术有限公司 | Control method of medium-speed mill of blast furnace coal injection and pulverizing system |
| CN103721833A (en) * | 2013-12-30 | 2014-04-16 | 广东电网公司电力科学研究院 | Linkage control method, linkage control system and linkage control device for inlet air pressure and capacity air volume of coal mill |
| CN103721833B (en) * | 2013-12-30 | 2016-05-11 | 广东电网公司电力科学研究院 | Coal pulverizer inlet blast and capacity air quantity inter-linked controlling method, system and device |
| CN105057078A (en) * | 2015-07-10 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Operational method for preventing mill of coal mill from being blocked |
| CN105057078B (en) * | 2015-07-10 | 2017-10-10 | 广东电网有限责任公司电力科学研究院 | The anti-blocking mill operation method of coal pulverizer |
| CN105135460A (en) * | 2015-09-24 | 2015-12-09 | 中国大唐集团科学技术研究院有限公司 | Pulverizing system air temperature regulating system |
| CN107297269A (en) * | 2017-08-29 | 2017-10-27 | 柴庆宣 | The control method of Material Level In Ball Mills |
| CN108325730B (en) * | 2018-04-13 | 2020-02-14 | 中国神华能源股份有限公司 | Method and device for controlling pulverizing system |
| CN108325730A (en) * | 2018-04-13 | 2018-07-27 | 中国神华能源股份有限公司 | The method and apparatus for controlling pulverized coal preparation system |
| CN108393146A (en) * | 2018-05-11 | 2018-08-14 | 东北大学 | A kind of ball mill pulverizing system adaptive optimal decoupling control method |
| CN109174423A (en) * | 2018-09-18 | 2019-01-11 | 国电龙源节能技术有限公司 | Pulverizer outlet temperature control system and method based on fineness of pulverized coal on-line tuning |
| CN109174423B (en) * | 2018-09-18 | 2023-08-11 | 国能龙源蓝天节能技术有限公司 | Coal mill outlet temperature control system and method based on-line adjustment of pulverized coal fineness |
| CN109847866A (en) * | 2019-04-23 | 2019-06-07 | 山东钢铁股份有限公司 | A kind of grinding machine ball adding control method and system |
| CN110404661A (en) * | 2019-07-27 | 2019-11-05 | 沛县祥龙矿山机械配件有限公司 | A kind of autocontrol method of thermal power plant ball mill pulverizing system |
| CN110614156A (en) * | 2019-09-11 | 2019-12-27 | 中再生纽维尔资源回收设备（江苏）有限公司 | Crusher system control method based on PID algorithm |
| CN110614156B (en) * | 2019-09-11 | 2021-05-25 | 中再生纽维尔资源回收设备（江苏）有限公司 | Crusher system control method based on PID algorithm |
| CN110947506A (en) * | 2019-12-20 | 2020-04-03 | 华润电力技术研究院有限公司 | Coal mill control method and equipment |
| CN112588424A (en) * | 2020-10-19 | 2021-04-02 | 湖州师范学院 | Ball milling and pulverizing system effective control method based on cloud intelligent model |
| CN115283094A (en) * | 2022-07-06 | 2022-11-04 | 国能龙源环保有限公司 | Method and device for controlling number of steel balls of ball mill, electronic equipment and storage medium |
| CN115283094B (en) * | 2022-07-06 | 2023-08-11 | 国能龙源环保有限公司 | Method and device for controlling number of steel balls of ball mill, electronic equipment and storage medium |
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