CN1584758A - Controlling method and system for digital steel-ball coal grinder - Google Patents
Controlling method and system for digital steel-ball coal grinder Download PDFInfo
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Abstract
A method for controlling coal grinder includes selecting measurement points on grinder and obtaining measured data, using artificial control platform to realize on line self optimizing for submitting out a set of optimum control policy on real time, applying said control information to control action of executing mechanism for coal grinder. A control system for realizing the method is also disclosed.
Description
Technical field
The present invention relates to a kind of control method and control system thereof of digitizing low speed coal mill.
Background technology
Low speed coal mill is the widely used a kind of coal dust preparation system of thermal power plant (abbreviation pulverized coal preparation system), require three processes of drying, grinding and conveying (comprise and separating) of pulverized coal preparation system that exerting oneself of being complementary arranged respectively, exert oneself for these three kinds and adapt each other, it is the pacing items of the normal operation of pulverized coal preparation system, pulverized coal preparation system designs correctly, adjust rationally (finding optimal operating condition) by adjusting test, and strict each parameter that keeps that is in operation, the operating mode of pulverized coal preparation system just can reach best level, be the powder process maximum of exerting oneself, the power consumption of unit weight coal dust is minimum.But the outer factor of disturbing in the reality is too many, (influence factor comprises the grindability coefficient to change complexity such as raw coal coal situation in the pulverized coal preparation system, moisture content etc.), operating condition off-design value is far, the main equipment structure of pulverized coal preparation system also has very big difference--and the design of most of power plant has high temperature wind, low temperature wind, and reduced air, also there are many power plant not have low temperature wind, by cold wind adjustment or reduced air adjustment, also have minority power plant to improve drying medium by stove cigarette wind, these have caused the operating a lot of problems of pulverized coal preparation system, mainly show coal-grinding, dry, conveying is exerted oneself and is not complementary, and is not operated in the best under a lot of situation and goes out the force, causes the waste of the energy, service ability is poor continuously, in most of the cases, also need operations staff's continuous monitoring, carry out artificial intervention.The automatic control problem of low speed coal mill does not have well solution always, has become the indeterminable all the year round control difficult problem of electric system, is difficult to realize the optimal economic operation.
Present powder process control system is just kept some fixing setting values, but not maintains on the optimum value, has two main causes to cause traditional optimization method invalid to pulverized coal preparation system.The first, because coupling is strong between each parameter, the change direction of system's unit power consumption of coal pulverizing might be wrong when changing setting value, causes the erroneous judgement to optimum operating condition; Second: the optimizing meeting plays pendulum pulverized coal preparation system for a long time continually, perhaps can often find best coal load quantity, but the rising of the unit power consumption of coal pulverizing that irregular operation caused is with partial offset even above the income of bringing thus.
In recent years, domestic some scientific research institutions and enterprise all add the ranks of exploitation steel ball mill, continue to use traditional control method but its detection means and control method all more, only change controlled variable, can not reach satisfied control effect, be difficult to control the system that the controlled device dynamic perfromance differs greatly.Do not solve the design and running situation of low speed coal mill complexity, thereby versatility is relatively poor, is difficult to promote.No matter manually or automated manner, what mode to remove to control pulverized coal preparation system with, most applications was in the past, supposing has under the desirable optimal operating condition, by transferring the coal baffle controls to exert oneself, with hot-air damper control low speed coal mill outlet temperature, with low temperature wind or other wind control entrance negative pressure.In fact best operating point is often disturbed, and therefore, original automated manner just is difficult to this multifactorial variation of reply.And these control system can not be accepted the signal of power plant's management information system, can not provide signal to management decision again, thereby can not demonstrate fully that this system is efficiently low in the power station decreases operating vital role.American-European countries's less use steel ball mill control system, there is same problem technically in they; Russia uses the steel ball mill control system more, but the still opertaing device of the 1970s and 1980s of its utilization, integral body is more backward.
Summary of the invention
The technical problem to be solved in the present invention is: the situation according to reality is dynamically sought optimum condition, after dynamically determining optimum, keep definite definite value, realize continuous, economic control, promptly under the prerequisite that keeps best fineness of pulverized coal and certain coal dust moisture content, reach the coal dust maximum output, the consumption rate of grinding coal dust per ton is minimum, and boiler unit and pulverized coal preparation system comprehensive economy are the highest.And the pulverized coal preparation system operational factor directly sent in the management information network.Allow the manual switching of two-stage
The purpose of this invention is to provide a kind of digitizing low speed coal mill control method and control system thereof, realize multi-functional in the Digitizing And Control Unit of one, the whole optimum control scheme that solves ball mill pulverizing system, make that system in combination is flexible, reliability is high, realize the optimum of ball mill pulverizing system, stable control.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention proposes the notion and the method for on-line decision control, uses online emulation technology, the same platform technology of Simulation Control, self study technology, realizes continuous changeable power condition under, safety, economic control.To reach the continuous operation of control system and not fall, the countermeasure of on-line decision is sought relative optimum condition, and the real mill every powder per ton of realizing can be saved 3 and spend.
The present invention proposes a kind of digitizing low speed coal mill control method, promptly based on the on-line decision control method of in-circuit emulation technology, comprising:
A chooses measurement point in the coal pulverizer system, obtain measurement data with measurement means; To the data that are difficult to measure, calculate and analyze with in-circuit emulation;
B, by Simulation Control Platform realize based on in-circuit emulation from optimizing, measurement data according to input is calculated and accident forecast, judge and the analysis current working, carry out the real-time adjustment and the optimizing of controlling schemes and parameter according to on-line decision control, one group of real-time optimum controling strategy is provided thus;
C is with the action of topworks on the described control information control coal pulverizer.
By developing support programs system and the application software system thereof of a powerful Simulation Control with platform, exploitation comprises on-line decision control, self study is from the DMS of optimizing function system (being called for short the DMS system), finish regulatory function with software (be stored in the I/O controller or in the supervisory control comuter), realize that optimum condition is from motion tracking and test, make full use of analogue system, being in operation, it is best not stop seeking under the prevailing condition, determine optimum condition according to thermal test, by regulating the hot blast door, cold-air flap, recirculation door, temperature air door and coal supply, to be grinding into a mouthful negative pressure, outlet temperature, coal load quantity/differential pressure is stabilized within the scope of rules permission, corrected parameter setting value and output order, and keep optimal value at any time, make and under various operating modes, keep exerting oneself more greatly, the on-line decision of realizing adapting to the automatic optimal of various operating modes and adapting to the controlling schemes of operating condition variation, coal pulverizer is controlled at optimal working point at that time automatically, realizes optimal control.
The present invention proposes a kind of digitizing low speed coal mill control system that is applicable to digitizing low speed coal mill simulation control method, comprises sensor unit, input/output signal processing unit, simulation analysis and optimizing unit, on-line decision control module, wherein:
A, sensor unit are used to gather the measurement data of each measurement point, and data are inputed to the input signal processing unit;
B, input/output signal processing unit are used for measurement data is become available quantities unit signal, and the control output signal is transferred to indicating equipment and topworks after conversion;
C, simulation analysis and optimizing unit are used for the quantities unit signal is carried out real-time simulation analytical calculation and accident forecast, judge current working and optimizing, export the setting value of current optimum;
D, on-line decision control module are used to receive the setting value of Simulation Control unit output, calculate steering order and export topworks to.
On the structure of system, locate to be provided with sensor unit and measurement point at raw coal controllable register, low speed coal mill inlet and outlet, mill separator baffle plate, cyclone separator, mill exhauster etc., and the coal load quantity measuring equipment of the present invention's exploitation is installed, these sensor units and measurement point and I/O controller, supervisory control comuter are formed a computer network system.
Emulation of the present invention operates on the computer network with the same support platform of control, DMS system, all signals disperse formula full-digital network control system, and the transmission of signal is finished by digital communication fully, does not have the transmission of simulating signal; Interoperability manipulation has guaranteed the manufacturing of each parts of system all according to the codes and standards of international uniform, and the user can independently select.
The present invention has skilled hand behaviour, soft manual operation and automatic control function (being the manual switching of two-stage), and realizes three's no disturbance switching.
The present invention utilizes computer network, and the pulverized coal preparation system operational factor is directly sent in the management information network, sets up substantial connection with technical management, operational management, the equipment control of power plant, realizes control and the unification of managing.
The following (see figure 1) of control principle of the present invention:
On-line decision control comprises the on-line decision to controlled variable, the on-line decision of controlling schemes: the on-line decision of control definite value: on-line decision is controlled the performance that improves system by the parameter that changes controller, strengthens the adaptive faculty of control system.On-line decision control can be carried out on-line tuning to controller, obtains the parameter of one group of satisfaction, and comes system is optimized by the real time modifying controller parameter.The controlling schemes on-line decision: on-line decision control not only changes the parameter of control system, but by on-line decision real time altering controlling schemes, tackles the problem at its root.
In-circuit emulation: fully select representative, good reliability, signal that maintenance is little for use, use the problems of measurement that online emulation technology solves the difficult point signal; The predictive ability of enhanced system.
Based on in-circuit emulation from optimizing: through the whole service process, be made up of two stages: the phase one is based on historical from optimizing, subordinate phase be based on online emulation from optimizing, the phase one is the basis of subordinate phase and prepares.In the phase one, in time recommend some setting values to control loop, be line modeling and----follow the tracks of time-varying system model----and prepare raw data.When the data of collecting are enough to set up a preliminary available model, enter the higher subordinate phase optimizing of intelligent degree automatically.After entering subordinate phase, at pulverized coal preparation system model of main frame inter-sync ground operation, this model has been simulated from all collection capacities exactly to the mapping function the unit power consumption of coal pulverizing, might keep the external condition group of a period of time to one through judging, in time searching out under this external condition with the unit consumption minimum is the best of breed of three controlled volumes of target, offers control loop as the setting value in following a period of time.External condition is made up of such parameter: itself more stable (for the pace of change of other process variable), when it changes, will make the operating mode of pulverized coal preparation system that observable change takes place thereupon, and pulverized coal preparation system when being subjected to disturbance from other factor (as adjusting plate washer) can not change it.This structure can make pulverized coal preparation system often operate in the optimum operating condition under the prevailing condition, such operating mode can be kept one long period again.
Measuring-signal is the information that is used for understanding pulverized coal preparation system ruuning situation, and pulverized coal preparation system is except that negative pressure, temperature signal, and the present invention has developed the measuring-signal in order to the expression coal load quantity, and this is the direct signal of expression pulverized coal preparation system ruuning situation.
Good effect of the present invention is: system design has met or exceeded concerned countries standard or international standard.Compare with manual control, the present invention reaches optimal economic operation and relative minimum system unit consumption, realized the energy-saving effects about average preparation coal dust saving 3 degree electricity per ton, reduced station service power consumption rate effectively, will play great facilitation the energy-saving and cost-reducing of China's power industry.The present invention has realized multi-functional Digital Control in one, the autostable operation, and system's stochastic analysis function is strong, ability with prediction fault, be controller be again replicating machine, self-learning machine, also be the management good assistant, be convenient to the operation and the maintainer grasp system situation at any time.The expense that the user purchases this system will obtain reclaiming in a short time, and economic benefit is considerable.
Description of drawings
Fig. 1 is control principle figure of the present invention;
Fig. 2 is a signal flow graph of the present invention;
Fig. 3 is the manual switching synoptic diagram of two-stage of the present invention;
Fig. 4 is a coal mill system measuring point distribution plan of the present invention;
Fig. 5 is a two-level network synoptic diagram of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, the present invention proposes a kind of digitizing low speed coal mill simulation control method, comprising:
A chooses measurement point on coal pulverizer, obtain measurement data with measurement means;
B, based on Simulation Control Platform, by realize in-circuit emulation from optimizing, the measurement data of input is carried out analytical calculation and accident forecast, judge current working and optimizing, and carry out on-line decision control in view of the above, one group of real-time Optimal Control information is provided;
C is with the action of topworks on the described control information control coal pulverizer.
As shown in Figure 2, the DMS desired signal becomes digital signal through the collection of IO system (AI/DI data acquisition module), becomes available quantities unit signal by the input signal processing unit; Under the support of Simulation Control Platform, exerting oneself in real time to system and calculate and accident forecast in the in-circuit emulation unit, and gives self study from optimizing unit and on-line decision control module with the result; Self study is judged and optimizing current working from the optimizing unit, recommends out the setting value of current optimum to give the on-line decision control module; The comprehensive all signals of on-line decision control module, calculation control is instructed, and becomes electric signal by signal output processing unit, IO system (A0/D0 data outputting module), goes to control on-the-spot topworks, makes manipulated signal reach current optimal value.The input signal of system can be shown that all output signal can be carried out manual operation by man-machine interface by man-machine interface under the soft manual operation state.
The present invention proposes a kind of digitizing low speed coal mill control system that is applicable to digitizing low speed coal mill simulation control method, comprises sensor unit, input/output signal processing unit, simulation analysis and optimizing unit, on-line decision control module, wherein:
A, sensor unit are used to gather the measurement data of each measurement point, and data are inputed to the input signal processing unit;
B, input/output signal processing unit are used for measurement data is become available quantities unit signal, and the control output signal is transferred to indicating equipment and topworks after conversion;
C, simulation analysis and optimizing unit are used for the quantities unit signal is carried out real-time simulation analytical calculation and accident forecast, judge current working and optimizing, export the setting value of current optimum;
D, on-line decision control module are used to receive the setting value of Simulation Control unit output, calculate steering order and export topworks to.
Below be example with most widely used hot blast pulverized coal preparation system general, the middle powder of canonical system----storehouse formula that the user is maximum, the present invention is described in detail in detail in conjunction with the accompanying drawings.
As shown in Figure 4, the present invention can be achieved like this: digitizing low speed coal mill control system essence is a network system.In the pulverized coal preparation system of middle powder storehouse formula, comprise bowl mill 1, mill separator 2, mill exhauster 3, cyclone separator 6, run coal bin 7, belt coal-feeding machine 8, low temperature wind inlet 4, high temperature wind inlet 5, row's powder outlet 9, the load of pulverizer capacity and boiler does not have direct relation, can follow the variation of boiler load constantly, the difference that both exert oneself can be handled up by Pulverized Coal Bin and is used for replenishing.Sensor unit and measurement point, coal load quantity measuring equipment are set: bowl mill 1 entrance negative pressure S
M, bowl mill 1 temperature in t
Ma, bowl mill 1 outlet temperature t
Mb, bowl mill 1 gateway pressure differential deltap P
u, bowl mill 1 enters the mouth to mill separator 2 inlet pressure differential deltap P
U-n, powder position pressure differential deltap P
y, orifice differential pressure Δ P
w, raw coal controllable register aperture (exerting oneself) yn
T(B), recycle air door aperture yn
p, 4 aperture yn of low temperature wind inlet
H, 5 aperture yn of high temperature wind inlet
m, mill exhauster 3 entrance door aperture yn
M1b, mill exhauster 3 entrance negative pressure S
Mb, mill separator 2 baffle opening yn
c, fineness of pulverized coal R
Gg, coal load quantity signal V
y, these sensor units and measurement point and I/O controller, supervisory control comuter are formed a computer network system.Sensor unit and actuator unit are nodes on the network, and traditional regulator has not existed, and regulatory function is distributed in the I/O controller with form of software or in the supervisory control comuter.Described sensor unit and measurement point obtain with general equipment and habitual means.
Set up emulation and with platform AF2000 various tasks such as simulation calculating, control algolithm, optimizing are carried out uniform dispatching, make in-circuit emulation support control and optimizing in real time with the control support.Emulation is supported two platform AF2000 inside with control real-time data base, realizes the shared fully of emulation and control data.It is operating system with Windows 2000 Pro that emulation is supported two platform AF2000 with control, runs on the High Performance IP C machine, possesses nuclear power level security performance.
On supporting with platform AF2000, emulation and control sets up DMS system--DMS2800.After the DMS2800 system puts into operation, at first enter the phase one of optimizing, in this stage, in time recommend some setting values, for line modeling is prepared raw data to control loop.Follow the tracks of the time-varying system model, this is the core that online optimizing is calculated, and when the data of collecting were enough to set up a preliminary available model, DM2800 just entered the higher subordinate phase optimizing of intelligent degree automatically.After entering subordinate phase, at pulverized coal preparation system model of main frame inter-sync ground operation, this model has been simulated from all collection capacities exactly to the mapping function the unit power consumption of coal pulverizing, might keep the external condition group of a period of time to one through judging, in time searching out under this external condition with the unit consumption minimum is the best of breed of three controlled volumes of target, offers control loop as the setting value in following a period of time.External condition is made up of such parameter: coal, raw coal, moisture, steel ball loading capacity etc.This structure can make pulverized coal preparation system often operate in the optimum operating condition under the prevailing condition, such operating mode can be kept one long period again.
As seen from Figure 5, digitizing low speed coal mill control system is made up of two-level network: field level networks 40 and monitoring level network 50.Field level adopts the industrial field bus technology, and required conventional simulation signal is converted to digital signal by I/O equipment 41, inserts field level networks 40.I/O controller 42 is the another kind of equipment in the field level networks, and all control algolithm and logics are all finished by it.It can be divided into as several parts such as adjusting, logic, protections by function, be placed on respectively in several I/O controllers 42.In addition, for guaranteeing the reliability of entire system, the corresponding one or more I/O controllers 42 of the control of every coal pulverizer form dcs, have reduced the danger that causes owing to controller failure.Because present controller can't be realized the SPC algorithm, therefore, present stage I/O controller 42 is to exist as the reserve of supervisory control comuter, crash when supervisory control comuter is unexpected for a certain reason, adjustment state before I/O controller 42 can keep crashing, send warning simultaneously, alert is handled, and has reduced the danger that causes owing to the supervisory control comuter fault.Monitoring level network 50 adopts standard ethernet, ICP/IP protocol, and the opening of communication has guaranteed the convenience that system expands in the future.Consider that pulverized coal preparation system 43 is not the critical system of power plant, the problems such as insufficient space of the cost of system, power plant's central station of floating dock in addition, monitoring level network 50 only is provided with a computing machine----monitoring station 51 at present, it is connected on the monitoring level network 50 by the Ethernet card of standard, by the opertaing device communication of fieldbus network interface card 52 with field level.Monitoring station has comprised the function of operator station, engineer station and the controller of conventional DCS: operation MMI software can monitor and controls the scene; The operation configuration software can carry out the modification of control algolithm to field control equipment; The operation real-time control software can be realized SOFT PLC function.By router five 3 field level networks 40 is carried out transparent the connection with monitoring level network 50.Router five 3 built-in Web Server functions can be issued with the form of webpage the real time data of pulverized coal preparation system 43 on the management information system in enterprise network, support telemonitoring to browse and configuration.
Because the security of native system is considered in the existing manually control of on-the-spot at present pulverized coal preparation system, will keep original system and grasp, as seen from Figure 3 two-stage hand/automatic switchover order as the skilled hand.By the manual operator of central station of floating dock manually control and computer control between switching, be referred to as first order hand/automatic switchover 31, when the hand behaviour signal 33 of manual operator is positioned at " manually ", actuator 35 is accepted the output signal of manual operator, and the output signal of computer control system is in tracking mode; When manual operator is positioned at " automatically ", carry out the manual switching of controlling between 341 (soft manual operations) and the computer controlled automatic 342 of computing machine by the man-machine interface 34 of computing machine, be referred to as second level hand/automatic switchover 32, actuator 35 is accepted the output signal of computer control system, and the output signal of manual operator is in tracking mode.Above-mentioned two-stage hand behaviour design makes system have three kinds of operational modes: automatically, soft manual operation, skilled hand behaviour, guaranteed the safe and reliable operation of system.
Systemic-function: 1. automatic optimal, the correction of emulation training optimum condition, the system of trying to achieve is better; 2. Based Intelligent Control is guaranteed systematic parameter control, drops into automatically; 3. performance analysis: the forecast analysis of analytic system state operating mode provides processing scheme; 4. operating analysis: record operation conditions, statement analysis; 5. operation note: the reference of operating analysis examination; Fault alarm also provides processing to instruct; 6. index examination: comprise the counting statistics of economic target and appraise and choose excellent; Self check such as signal, system; Realize the order start and stop of pulverized coal preparation system; Guidance puts into operation; 7. emulation training or the like.
System architecture: reasonable in design, the configuration of the mini system of anti-rich plan, not only uncomplicated but also the leeway of expansion arranged.
Technical indicator: communication distance: 90km traffic rate farthest: the maximum I/O of the fastest 12Mbps station number: 126 each I/O maximum I/O that stands counts: 32 dot system capacity: 65536 points (comprising internal point and I/O point) typical response time: the automatic control stabilization of 1ms system input working time is more than 90%.
System's operation: reliable, safety, detection signal is accurate, stable, maintenance is little, and topworks is flexible.
There are recycle, middle storage formula not to have recycle etc. for other steel ball powder-grinding system such as the exhaust steam of direct-firing, middle storage formula, middle storage formula, all can utilize its analogue system, corresponding sensor unit and measurement point are set, set up corresponding calculated machine network, under emulation and the support of control with support platform, operation corresponding online Decision Control, self study are from the DMS of optimizing function system, realize that the corresponding exhaust steam of direct-firing, middle storage formula, middle storage formula have recycle, middle storage formula not to have digitizing low speed coal mill control system such as recycle, do not describe in detail.
Claims (9)
1. digitizing low speed coal mill simulation control method is characterized in that:
A chooses and installs additional measurement point on coal pulverizer, obtain measurement data with measurement means;
B, based on Simulation Control Platform, by realize in-circuit emulation from optimizing, the measurement data of input is carried out analytical calculation and accident forecast, judge current working and optimizing, and carry out on-line decision control in view of the above, one group of real-time Optimal Control information is provided;
C is with the action of topworks on the described control information control coal pulverizer.
2. digitizing low speed coal mill simulation control method according to claim 1, it is characterized in that realizing by following steps from optimizing of described in-circuit emulation: the phase one is based on historical from optimizing, subordinate phase be based on online emulation from optimizing, in the phase one, in time recommend some setting values to control loop,---follow the tracks of of time-varying system model---prepares raw data when the data of collection are enough to set up a preliminary available model to be line modeling, automatically enter the higher subordinate phase optimizing of intelligent degree, after entering subordinate phase, at pulverized coal preparation system model of main frame inter-sync ground operation, this model is simulated from all collection capacities exactly to the mapping function the unit power consumption of coal pulverizing, might keep the external condition group of a period of time to one through judging, in time searching out under this external condition with the unit consumption minimum is the best of breed of three controlled volumes of target, offers control loop as the setting value in following a period of time.This structure can make pulverized coal preparation system often operate in the optimum operating condition under the prevailing condition, such operating mode can be kept one long period again.
3. a digitizing low speed coal mill control system that is applicable to the described method of claim 1 comprises sensor unit, input/output signal processing unit, simulation analysis and optimizing unit, on-line decision control module, it is characterized in that:
A, sensor unit are used to gather the measurement data of each measurement point, and data are inputed to the input signal processing unit;
B, input/output signal processing unit are used for measurement data is become available quantities unit signal, and the control output signal is transferred to indicating equipment and topworks after conversion;
C, simulation analysis and optimizing unit are used for the quantities unit signal is carried out real-time simulation analytical calculation and accident forecast, judge current working and optimizing, export the setting value of current optimum;
D, on-line decision control module are used to receive the setting value of Simulation Control unit output, calculate steering order and export topworks to.
4. digitizing low speed coal mill control system according to claim 3 is characterized in that described metrical information comprises negative pressure signal, temperature signal, coal load quantity signal, and described measurement point comprises bowl mill entrance negative pressure S
M, bowl mill temperature in t
Ma, bowl mill outlet temperature t
Mb, bowl mill gateway pressure differential deltap P
u, bowl mill enters the mouth to mill separator inlet pressure differential deltap P
U-n, powder position pressure differential deltap P
y, orifice differential pressure Δ P
w, raw coal controllable register aperture (exerting oneself) yn
T(B), cycle throttle aperture yn
p, low temperature throttle opening yn
H, high temperature throttle opening yn
m, mill exhauster entrance door aperture yn
M1b, mill exhauster entrance negative pressure S
Mb, mill separator baffle opening yn
c, fineness of pulverized coal R
Gg, coal load quantity signal V
y
5. digitizing low speed coal mill control system according to claim 3, it is characterized in that sensor unit and measurement point and I/O controller, computer network system of supervisory control comuter composition, sensor unit and actuator unit are nodes on the network, traditional regulator has not existed, and regulatory function is distributed in the I/O controller with form of software or in the supervisory control comuter.
6. digitizing low speed coal mill control system according to claim 3, it is characterized in that described Simulation Control unit comprises that in-circuit emulation unit and self study are from the optimizing unit, set up emulation and with platform AF2000 various tasks such as simulation calculating, control algolithm, optimizing are carried out uniform dispatching, make in-circuit emulation support control and optimizing in real time with the control support.It is operating system with Windows2000Pro that emulation is supported two platform AF2000 with control, runs on the High Performance IP C machine, possesses nuclear power level security performance, sets up DMS system---DMS2800 on emulation and control are supported with platform AF2000.
7. digitizing low speed coal mill control system according to claim 3 is characterized in that: the output of steering order realizes hand behaviour, soft manual operation and control three's no disturbance switching automatically by two-stage hand/automatic switchover.
8. according to claim 3 or 7 described digitizing low speed coal mill control system, it is characterized in that what two-stage hand/automatic switchover realized like this: by the manual operator of central station of floating dock manually control and computer control between switching, be referred to as first order hand/automatic switchover, when manual operator is positioned at " manually ", actuator is accepted hand behaviour's output signal, and the signal of computer control system is in tracking mode; When manual operator is positioned at " automatically ", carry out computing machine by the man-machine interface of computing machine and manually control switching between (soft manual operation) and the computer controlled automatic, be referred to as second level hand/automatic switchover, actuator is accepted the output signal of computer control system, and the output signal of manual operator is in tracking mode.
9. digitizing low speed coal mill control system according to claim 1; it is characterized in that: control system is made up of field level and monitoring level two-level network; field level networks adopts the industrial field bus technology; include I/O equipment in the field level networks; the I/O controller; the conventional simulation signal is a digital signal by the I/O device translates; all control algolithms and logic are all finished by the I/O controller; it can be divided into as regulating by function; logic; several parts such as protection; be placed on respectively in several I/O controllers; the corresponding one or more I/O controllers of the control of every coal pulverizer; form dcs; when supervisory control comuter crashes owing to certain reason is unexpected; adjustment state before the I/O controller can keep crashing; send warning simultaneously; alert is handled; monitoring level network using standard ethernet; ICP/IP protocol; include computing machine in the monitoring level network---monitoring station; monitoring station is connected on the monitoring level network by the Ethernet card of standard; also can pass through the function of the controller of fieldbus network interface card and field level---operation MMI software; can monitor and control the scene; the operation configuration software; can realize SOFT PLC function; can field level networks be carried out transparent the connection with the monitoring level network by router; the built-in Web Server of router function; the real time data of pulverized coal preparation system can be issued on the management information system in enterprise network with the form of webpage; support telemonitoring to browse and configuration; technical management with power plant; operational management; substantial connection is set up in equipment control, realizes control and the unification of managing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101261150B (en) * | 2007-03-08 | 2010-07-21 | 珠海市华远自动化科技有限公司 | Method for measuring steel ball grinding material level |
| CN101334666B (en) * | 2008-07-15 | 2010-10-27 | 西安艾贝尔科技发展有限公司 | Double-inlet double-outlet steel ball coal mill straight blowing type milling system optimized control method |
| CN102592004A (en) * | 2011-12-19 | 2012-07-18 | 中冶南方(武汉)威仕工业炉有限公司 | System and method for on-line analysis and diagnosis of whole-process energy-consuming conditions of integrated iron and steel works |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100283419B1 (en) * | 1993-03-03 | 2001-06-01 | 빈센트 에쎄.아. | Control Process of Closed Circuit Dryer |
| JP3796027B2 (en) * | 1997-11-18 | 2006-07-12 | 積水化学工業株式会社 | Medium motion simulation device in crusher and crusher operating energy amount simulation device |
| JPH11333311A (en) * | 1998-03-26 | 1999-12-07 | Sekisui Chem Co Ltd | Noncrystallization prediction method for inorganic powder |
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| CN115337999B (en) * | 2022-08-29 | 2023-10-20 | 河北西柏坡第二发电有限责任公司 | Method for periodically supplementing steel ball for steel ball coal mill |
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